CN107167207B - Water meter device - Google Patents
Water meter device Download PDFInfo
- Publication number
- CN107167207B CN107167207B CN201710527675.5A CN201710527675A CN107167207B CN 107167207 B CN107167207 B CN 107167207B CN 201710527675 A CN201710527675 A CN 201710527675A CN 107167207 B CN107167207 B CN 107167207B
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- CN
- China
- Prior art keywords
- circuit board
- water
- water meter
- electrically connected
- water pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 120
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 26
- 238000012544 monitoring process Methods 0.000 claims abstract description 4
- 238000001514 detection method Methods 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 5
- 239000003973 paint Substances 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/06—Indicating or recording devices
- G01F15/061—Indicating or recording devices for remote indication
- G01F15/063—Indicating or recording devices for remote indication using electrical means
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention provides a water meter device, which comprises a water pipe and a water meter assembly for monitoring the water flow rate in the water pipe, wherein the water meter assembly comprises a box body which is fixed on the water pipe and provided with an opening, an outer cover which is hinged on the box body and can cover the opening, a circuit board which is arranged in the box body, a chip which is arranged on the circuit board and is electrically connected with the circuit board, a graphene flow sensor which is electrically connected with the circuit board and stretches into the water pipe, a display screen which is arranged in the box body and is electrically connected with the circuit board, and a cover opening switch which is arranged on the outer cover and is electrically connected with the circuit board. According to the water meter device provided by the invention, the box body is arranged on the water pipe to load the circuit board, the chip and the display screen, and the graphene flow sensor extending into the water pipe is electrically connected with the circuit board, so that the accurate measurement of the water flow in the water pipe is ensured, the daily frozen water quantity of a user is settled, and the water meter device is low in cost and low in power consumption.
Description
Technical Field
The invention relates to the technical field of household water meters, in particular to a water meter device.
Background
The current household water meter is a mechanical water meter under the sky, has low cost, poor precision and no freezing water consumption capacity, and can meet relevant requirements only by additionally arranging a character wheel direct reading device, thereby having high cost and poor reliability.
At present, all electronic water meters which are easy to realize settlement of daily frozen water quantity on the market mainly comprise ultrasonic water meters and electromagnetic water meters, but all the water meters have the defects of high cost (the household meter is more than 250 yuan/year), high power consumption (more than 2.5 Ah/year), poor measurement precision of the household meter and the like, and cannot fully enter the household.
Disclosure of Invention
The invention aims to provide a water meter device, which aims to solve the technical problems of high cost, high power consumption and poor measurement precision of the existing full-electronic water meter which is easy to realize settlement of daily frozen water quantity in the prior art.
The embodiment of the invention provides a water meter device, which comprises a water pipe, a water meter assembly for monitoring water flow in the water pipe, wherein the water meter assembly comprises a box body which is fixed on the water pipe and provided with an opening, an outer cover which is hinged on the box body and can cover the opening, a circuit board arranged in the box body, a chip which is arranged on the circuit board and is electrically connected with the circuit board, a graphene flow sensor which is electrically connected with the circuit board and stretches into the water pipe, a display screen which is arranged in the box body and is electrically connected with the circuit board, and a cover opening switch which is arranged on the outer cover and is electrically connected with the circuit board.
Further, the water meter device further comprises a data interface connected with the meter reading device, and the data interface is arranged on the circuit board and is electrically connected with the circuit board.
Further, an external interface is formed on the box body, and the external interface is located at a position on the box body, which is opposite to the data interface.
Further, the water meter device further comprises a wireless communication module which is used for being in communication connection with external equipment, and the wireless communication module is arranged on the circuit board and is electrically connected with the circuit board.
Further, a detection opening is formed in the side wall of the water pipe, an installation cover is arranged on the detection opening, the bottom of the installation cover is connected with an installation seat penetrating through the detection opening and extending into the water pipe, and the graphene flow sensor is connected to the installation seat.
Further, the water meter device further comprises a wire, one end of the wire is connected to the graphene flow sensor, and the other end of the wire penetrates through the mounting cover and then stretches into the box body to be electrically connected with the circuit board.
Further, a sealing ring is sleeved on the mounting seat, and the sealing ring seals a gap between the mounting seat and the detection port.
Further, an upper cover is arranged in the box body, and the display screen is fixed on the upper cover; the upper cover and the box body are enclosed to form a containing cavity, and the circuit board is positioned in the containing cavity.
Further, a power supply electrically connected with the circuit board is arranged in the box body.
Further, waterproof paint is sprayed on the surface of the circuit board.
Based on the technical scheme, compared with the prior art, the water meter device provided by the embodiment of the invention has the advantages that the box body is arranged on the water pipe to load the circuit board, the chip and the display screen, and the graphene flow sensor extending into the water pipe is electrically connected with the circuit board, so that the accurate measurement of the water flow in the water pipe is ensured, the daily frozen water quantity of a user is realized, and the water meter device has low cost and low power consumption.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is an exploded view of a water meter device according to an embodiment of the present invention;
fig. 2 is a control schematic diagram of a water meter device according to an embodiment of the invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.
In addition, it should be further noted that the directions or positional relationships indicated by the left, right, upper, lower, etc. in the embodiments of the present invention are directions or positional relationships based on the drawings, and are merely for convenience of description and simplification of description, and are not indicative or implying that the apparatus or element in question must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like in embodiments of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. The implementation of the present invention will be described in detail below with reference to specific embodiments.
As shown in fig. 1 to 2, an embodiment of the present invention proposes a water meter device, which includes a water pipe 1 and a water meter assembly 2, wherein the water pipe 1 is used for being connected to a user's home line, and the water meter assembly 2 is used for monitoring the flow rate of water flowing through the water pipe 1. Specifically, the water meter assembly 2 may include a box 21, an outer cover 22, a circuit board 23, a chip 24, a graphene flow sensor 25, a display screen 26 and a cover opening switch 27, wherein the box 21 is fixed on the water pipe 1, the circuit board 23 is disposed in the box 21, the chip 24 is disposed on the circuit board 23 and electrically connected therewith, the display screen 26 is preferably a liquid crystal screen, and the display screen 26 is also disposed in the box 21 and electrically connected with the circuit board 23. In addition, the top end of the case 21 has an opening, and the cover 22 is hinged to the case 21 and can cover the opening, and the cover opening and closing switch 27 is provided on the cover 22 and electrically connected to the circuit board 23. In addition, the graphene flow sensor 25 is preferably a mesh-shaped graphene flow sensor, and the graphene flow sensor 25 extends into the water pipe 1 and is electrically connected to the circuit board 23. In the invention, when the water meter device works, the chip 24 enters a working state, the graphene flow sensor 25 is intermittently powered, meanwhile, the chip 24 calculates the flow by using a related formula and coefficient (calibrated when leaving a factory) according to the acquired value by acquiring the parameters of the graphene flow sensor 25, integrates to obtain the water consumption, and stores a primary value into FLASH in the chip 24 when the accumulated water consumption exceeds 0.0001 cube. When the uncap signal of the uncap switch 27 is received, the display screen 26 is lighted back light and the real-time water consumption is displayed. Here, the chip 24 can be obtained with reference to the prior art. According to the invention, the box body 21 is arranged on the water pipe 1 and is provided with the circuit board 23, the chip 24 and the display screen 26, and the graphene flow sensor 25 extending into the water pipe 1 is electrically connected with the circuit board 23, so that the accurate measurement of the water flow in the water pipe 1 is ensured, the daily frozen water amount of user settlement is realized, and the water meter device has low cost and low power consumption.
Further, in an embodiment of the present invention, the water meter device further includes a data interface 231 for connecting with a meter reading device (not shown in the drawings), and the data interface 231 is disposed on the circuit board 23 and electrically connected therewith. Here, the data interface 231 is preferably a USB interface, and the user connects the interface and the meter reading device through a data line, and opens the cover opening switch 27 by opening the outer cover 22, so that the water consumption data can be transmitted to the meter reading device, thereby completing meter reading. In addition, the data interface 231 can be electrically connected with an external power supply, and the whole water meter device can be powered by the external power supply. Of course, according to actual situations and specific requirements, in other embodiments of the present invention, the water consumption data may be output in other manners, and the whole water meter device may be powered in other manners, which is not limited only herein.
Further, in an embodiment of the present invention, an external interface 210 is formed on a side wall of the case 21, and the external interface 210 is located on the case 21 opposite to the data interface 231. The user connects the meter reading device through one end of the data line, and the other end passes through the external interface 210 and is connected to the data interface 231 to realize data connection.
Further, in an embodiment of the present invention, the water meter device further includes a wireless communication module (not shown in the drawings) for wireless communication connection with an external device, and the wireless communication module is disposed on the circuit board 23 and electrically connected thereto. Here, the wireless communication module can be communication modules such as infrared, RF, bluetooth, zigbee, NB-lot, RS485, MBus, etc., and can conveniently perform remote copying of data and remote setting of parameters, and can also conveniently access various internet of things platforms such as four-in-one.
Further, in an embodiment of the present invention, the side wall of the water pipe 1 has a detection port 10, the detection port 10 is provided with a mounting cover 28, the bottom of the mounting cover 28 is connected with a mounting seat 29, and the mounting seat 29 is disposed in the detection port 10 in a penetrating manner and extends into the water pipe 1. The graphene flow sensor 25 is connected to the mount 29. Here, a seal ring 291 is fitted over the mount 29, and the seal ring 291 seals a gap between the mount 29 and the detection port 10. Of course, in other embodiments of the present invention, the graphene flow sensor 25 may be placed within the water pipe 1 by other means, which is not limited only herein.
Further, in an embodiment of the present invention, the water meter device further includes a wire (not shown in the drawings) for electrically connecting the graphene flow sensor 25 and the circuit board 23, wherein the mounting cover 28 and the mounting seat 29 are hollow members, one end of the wire is connected to the graphene flow sensor 25, and the other end of the wire passes through the mounting seat 29 and the mounting cover 28 and then extends into the box 21 and is electrically connected to the circuit board 23. Of course, according to actual situations and specific requirements, in other embodiments of the present invention, the graphene flow sensor 25 and the circuit board 23 may be electrically connected by other manners, which is not limited herein.
Further, in an embodiment of the present invention, an upper cover 211 is further disposed in the case 21, and the display screen 26 is fixed on the upper cover 211; the upper cover 211 and the case 21 are enclosed to form a containing cavity 20, and the circuit board 23 and other components disposed thereon are located in the containing cavity 20.
Further, in an embodiment of the present invention, the water meter device may further include a power source M, preferably a disposable lithium battery, disposed in the accommodating cavity 20 of the case 21 and electrically connected to the circuit board 23. Of course, according to the actual situation and specific requirements, in other embodiments of the present invention, the whole water meter device may be powered by other manners, which is not limited herein.
Further, in an embodiment of the present invention, a waterproof paint is sprayed on the surface of the circuit board 23. Through spraying waterproof paint for circuit board 23 has had dampproofing waterproof function, has avoided because of wet short circuit and the damage of circuit that leads to, has improved the device life-span. Of course, according to the actual situation and specific requirements, in other embodiments of the present invention, the waterproofing treatment may be performed by other manners, which is not limited only herein.
The water meter device provided by the invention has two working states, and is concretely as follows:
one is to provide power externally through the data interface 231, at which time the disposable lithium battery (i.e., power source M) within the cartridge 21 is not powered. In this state, the chip 24 operates in a normal state, supplies power to the graphene flow sensor 25 once per second, collects parameters of the graphene flow sensor 25, and checks whether the parameters change, if so, increases the collection rate to twice per second, calculates the flow rate according to the collection value by using a related formula and coefficient (calibration in factory), integrates to obtain the water consumption, and stores a primary value into the FLASH of the chip 24 when the accumulated water consumption exceeds 0.0001 cube. When the uncap signal of the uncap switch 27 is received, the backlight of the display screen 26 is lighted and the real-time water consumption is displayed for 30 seconds. When receiving the command transmitted from the data interface 231, the commands such as real-time water consumption, monthly frozen water consumption in one year, key change list number, date/time, meter reading day setting and the like are received and responded. At ordinary times, the relevant setup tasks are performed in accordance with the RTC clock in the chip 24.
Alternatively, no power is provided from the outside, and at this time, the inside of the case 21 is supplied with power from a disposable lithium battery (i.e., power source M). In this state, the chip 24 operates in a micro-power consumption state, supplies power to the graphene flow sensor 25 twice per second, collects parameters of the graphene flow sensor 25, checks whether the parameters change, if so, increases the collection rate to once per second, calculates the flow rate according to the collection value by using a related formula and coefficient (calibration in factory), integrates to obtain the water consumption, and stores a value once into the FLASH of the chip 24 when the accumulated water consumption exceeds 0.0001 cube. When the uncap signal of the uncap switch 27 is received, the display 26 is caused to display the real-time water usage for 10 seconds, not more than 10 times per day in response to the uncap display. The relevant setup tasks are not performed in response to any commands from the data interface 231, but are performed at ordinary times in accordance with the RTC clock in the chip 24. Here, a 3400mAh disposable lithium battery is expected to operate for 8 years without external electricity, and its lifetime meets the requirements.
Based on the technical scheme, the water meter device provided by the embodiment of the invention has the advantages that the measurement precision can reach the level of a B-level water meter, which is far higher than that of a mechanical water meter, and the cost is lower than that of the direct-reading character wheel mechanical water meter and the ultrasonic water meter which are pushed at present, and the product reliability is high because few devices are arranged in the water meter device.
The above embodiments are merely specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any equivalent modifications, substitutions and improvements will readily occur to those skilled in the art within the scope of the present invention, and these modifications, substitutions and improvements are intended to be included in the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (9)
1. The water meter device comprises a water pipe and a water meter assembly for monitoring the flow rate of water in the water pipe, and is characterized in that the water meter assembly comprises a box body which is fixed on the water pipe and provided with an opening, an outer cover which is hinged on the box body and can seal the opening, a circuit board which is arranged in the box body, a chip which is arranged on the circuit board and is electrically connected with the circuit board, a graphene flow sensor which is electrically connected with the circuit board and stretches into the water pipe, a display screen which is arranged in the box body and is electrically connected with the circuit board, and a cover opening switch which is arranged on the outer cover and is electrically connected with the circuit board;
the side wall of the water pipe is provided with a detection opening, the detection opening is provided with a mounting cover, the bottom of the mounting cover is connected with a mounting seat, the mounting seat is arranged in the detection opening in a penetrating manner and extends into the water pipe, and the graphene flow sensor is connected to the mounting seat; the water meter assembly is used for calculating the flow through collecting parameters of the graphene flow sensor and integrating to obtain the water consumption;
the mounting cover and the mounting seat are hollow pieces.
2. The water meter apparatus of claim 1, further comprising a data interface for connection to a meter reader, the data interface being disposed on the circuit board and electrically connected thereto.
3. The water meter device of claim 2, wherein the housing defines an external interface, the external interface being positioned on the housing opposite the data interface.
4. The water meter apparatus of claim 1, further comprising a wireless communication module for communication with an external device, the wireless communication module being disposed on the circuit board and electrically connected thereto.
5. The water meter device of claim 1, further comprising a wire, wherein one end of the wire is connected to the graphene flow sensor, and the other end of the wire extends into the case body through the mounting cover and is electrically connected to the circuit board.
6. The water meter device of claim 1, wherein the mounting base is sleeved with a sealing ring, the sealing ring sealing a gap between the mounting base and the detection port.
7. The water meter device of claim 1, wherein an upper cover is further disposed within the housing, the display screen being secured to the upper cover; the upper cover and the box body are enclosed to form a containing cavity, and the circuit board is positioned in the containing cavity.
8. A water meter device as claimed in any one of claims 1 to 4, wherein a power source is provided in the housing in electrical connection with the circuit board.
9. A water meter apparatus as claimed in any one of claims 1 to 4, wherein the circuit board surface is sprayed with a water-resistant paint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710527675.5A CN107167207B (en) | 2017-06-30 | 2017-06-30 | Water meter device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710527675.5A CN107167207B (en) | 2017-06-30 | 2017-06-30 | Water meter device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107167207A CN107167207A (en) | 2017-09-15 |
| CN107167207B true CN107167207B (en) | 2023-08-22 |
Family
ID=59827597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710527675.5A Active CN107167207B (en) | 2017-06-30 | 2017-06-30 | Water meter device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107167207B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108627626A (en) * | 2018-05-24 | 2018-10-09 | 湖南国盛石墨科技有限公司 | A kind of water purity detecting device with graphene |
| CN115527502B (en) * | 2022-08-04 | 2024-04-05 | 浙江迪元仪表有限公司 | Intelligent water meter backlight control system and method based on infrared induction |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203489925U (en) * | 2013-09-02 | 2014-03-19 | 佛山市广华合志科技有限公司 | Passive intelligent water meter |
| CN103985197A (en) * | 2014-04-18 | 2014-08-13 | 东莞市新弘高科智能仪表有限公司 | Prepaid intelligent water meter system |
| EP2848591A1 (en) * | 2013-09-09 | 2015-03-18 | Paul Van Welden | Process and apparatus for the treatment of fluids by means of electrical induction |
| CN205785397U (en) * | 2016-07-06 | 2016-12-07 | 泰安市智慧能源科技有限公司 | A kind of electronic long-distance transmission heavy-caliber intelligent water meter |
| CN106225858A (en) * | 2016-08-01 | 2016-12-14 | 吉林吉大地球科学与地质开发股份有限公司 | A kind of based on graphene nano material as the liquid volume flow measurement apparatus of detecting electrode |
| CN206876242U (en) * | 2017-06-30 | 2018-01-12 | 深圳龙电电气股份有限公司 | Water meter device |
-
2017
- 2017-06-30 CN CN201710527675.5A patent/CN107167207B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203489925U (en) * | 2013-09-02 | 2014-03-19 | 佛山市广华合志科技有限公司 | Passive intelligent water meter |
| EP2848591A1 (en) * | 2013-09-09 | 2015-03-18 | Paul Van Welden | Process and apparatus for the treatment of fluids by means of electrical induction |
| CN103985197A (en) * | 2014-04-18 | 2014-08-13 | 东莞市新弘高科智能仪表有限公司 | Prepaid intelligent water meter system |
| CN205785397U (en) * | 2016-07-06 | 2016-12-07 | 泰安市智慧能源科技有限公司 | A kind of electronic long-distance transmission heavy-caliber intelligent water meter |
| CN106225858A (en) * | 2016-08-01 | 2016-12-14 | 吉林吉大地球科学与地质开发股份有限公司 | A kind of based on graphene nano material as the liquid volume flow measurement apparatus of detecting electrode |
| CN206876242U (en) * | 2017-06-30 | 2018-01-12 | 深圳龙电电气股份有限公司 | Water meter device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107167207A (en) | 2017-09-15 |
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Effective date of registration: 20240201 Address after: 518000 Nanshan Nanyou No.1 Industrial Zone, Shenzhen, Guangdong Province, 107 buildings and 3 floors Patentee after: Shenzhen Longdian Huaxin Holding Group Co.,Ltd. Country or region after: China Address before: 518000 5 T2, South District, Nanshan District hi tech Industrial Park, Shenzhen, Guangdong Patentee before: Ma Jian Country or region before: China |