CN112814977A - High-temperature-resistant ultra-high molecular polyethylene plate - Google Patents
High-temperature-resistant ultra-high molecular polyethylene plate Download PDFInfo
- Publication number
- CN112814977A CN112814977A CN202110160023.9A CN202110160023A CN112814977A CN 112814977 A CN112814977 A CN 112814977A CN 202110160023 A CN202110160023 A CN 202110160023A CN 112814977 A CN112814977 A CN 112814977A
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- Prior art keywords
- plate
- limiting
- high molecular
- heat insulation
- high temperature
- 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.)
- Pending
Links
- 239000004698 Polyethylene Substances 0.000 title claims abstract description 39
- -1 polyethylene Polymers 0.000 title claims abstract description 39
- 229920000573 polyethylene Polymers 0.000 title claims abstract description 39
- 238000009413 insulation Methods 0.000 claims abstract description 25
- 238000001125 extrusion Methods 0.000 claims abstract description 11
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 claims description 7
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 claims description 7
- 239000003063 flame retardant Substances 0.000 claims description 6
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 19
- 230000009471 action Effects 0.000 abstract description 10
- 230000008859 change Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000000126 substance Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 231100000956 nontoxicity Toxicity 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000000576 supplementary effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/06—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips
- F16B5/0607—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining sheets or plates to each other
- F16B5/0621—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining sheets or plates to each other in parallel relationship
- F16B5/0628—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining sheets or plates to each other in parallel relationship allowing for adjustment parallel or perpendicular to the plane of the sheets or plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/06—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs
- F16F15/067—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs using only wound springs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Clamps And Clips (AREA)
Abstract
The invention discloses a high-temperature-resistant ultra-high molecular polyethylene plate which comprises a limiting clamp, a heat insulation frame and a telescopic plate, wherein a sliding rail is arranged on the inner side wall of the limiting clamp, a sliding plate is movably connected inside the sliding rail, the upper surface of the sliding plate is movably connected with an adjusting bolt, the bottom of the sliding plate is movably connected with a limiting spring, and one end of the limiting spring is movably connected with an extrusion plate. According to the invention, through the arrangement of the limiting clamps, the limiting clamps can achieve the effect of pushing the sliding plate under the action of the sliding rail by rotating the adjusting bolts, and then achieve the effect of pushing the extrusion plate, so that the extrusion plate is extruded towards the bottom, therefore, the plate blocks of the polyethylene plate can be clamped into the limiting clamps in such a way, the limiting and fixing effects are achieved, the distance between the corresponding limiting clamps on the device can be adjusted by adjusting the length of the telescopic plate through the control bolts, and the adjustment can be carried out according to the use requirements.
Description
Technical Field
The invention relates to the technical field of polyethylene plate equipment, in particular to a high-temperature-resistant ultra-high molecular polyethylene plate.
Background
Polyethylene sheets have excellent impact resistance, even at low temperatures of-40F at ambient temperature, and the unique characteristic of HDPE grades is a suitable combination of four basic variables: density, molecular weight distribution, and additives, different catalysts are used to produce tailored specialty polymers, and these variables are combined to produce HDPE grades for different uses; the polyethylene board has the advantages of optimal balance in performance, good chemical stability, resistance to corrosion of most of acid, alkali, organic solution and hot water, good electrical insulation, no odor, no toxicity, wax-like hand feeling, excellent low-temperature resistance, good chemical stability, resistance to corrosion of most of acid and alkali, insolubility in common solvents at normal temperature, small water absorption, excellent electrical insulation performance, low density, good toughness, good stretchability, good electrical and dielectric insulation, low water absorption, low water vapor permeability, good chemical stability, tensile resistance, no toxicity and no harm, and certain defects exist in the use and installation of the existing polyethylene board.
The high temperature resistant ultra-high molecular polyethylene plate material in the prior art has the defects that:
1. in the prior art, a high-temperature-resistant ultra-high molecular polyethylene plate is lack of a stable and adjustable mounting structure when in use, and the same polyethylene plates are inconvenient to connect;
2. in the prior art, a high-temperature-resistant ultra-high molecular polyethylene plate is lack of protection for the polyethylene plate and a protection structure matched with the polyethylene plate in installation when in use.
Disclosure of Invention
The invention aims to provide a high-temperature-resistant ultra-high molecular weight polyethylene plate to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme that the high-temperature-resistant ultra-high molecular polyethylene plate comprises a limiting clamp, a heat insulation frame and a telescopic plate, wherein a sliding rail is arranged on the inner side wall of the limiting clamp, a sliding plate is movably connected inside the sliding rail, an adjusting bolt is movably connected to the upper surface of the sliding plate, a limiting spring is movably connected to the bottom of the sliding plate, and one end of the limiting spring is movably connected with an extrusion plate.
Preferably, the inner wall of the heat insulation frame is provided with a polyethylene plate, the upper surface and the bottom of the polyethylene plate are fixedly connected with heat insulation plates, the surface of each heat insulation plate is provided with a limiting clamping groove, and the surface of each heat insulation plate is fixedly connected with a flame retardant pad.
Preferably, the surface of the expansion plate is movably connected with a control bolt, and both ends of the expansion plate are fixedly connected with a limiting clamp.
Preferably, the bottom of the limiting clamp is fixedly connected with a supporting rod, and the bottom of the supporting rod is movably connected with a stretching plate.
Preferably, a clamping block is fixedly connected to the bottom of the extrusion plate.
Preferably, the bottom of the stretching plate is provided with a frosted bottom plate.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention can achieve the effect of pushing the sliding plate and further the effect of pushing the extrusion plate by rotating the adjusting bolt on the limiting clamp under the action of the sliding rail through the arrangement of the limiting clamp, so that the extrusion plate extrudes towards the bottom, therefore, the plate of the polyethylene plate can be clamped into the limiting clamp in this way, the device has the functions of limiting and fixing, the distance between the corresponding limiting clamps on the device can be adjusted by adjusting the length of the expansion plate through the control bolt, thereby being capable of being adjusted according to the use requirement, the arrangement of the stretching plate plays a role of limiting assistance to the stretching of the stretching plate, the whole device can move and change along with the length change of the stretching plate, and the connection structure between the limiting clamps is matched with the arrangement of the frosted bottom plate, so that the friction resistance of the bottom of the device is increased, and the device can reach a more stable use effect.
2. According to the invention, through the arrangement of the heat insulation frame, the heat insulation frame has a clamping effect on the polyethylene plate on the inner wall of the heat insulation frame, the polyethylene plate is protected more comprehensively by matching with the arrangement of the heat insulation plates on the upper surface and the lower surface of the heat insulation frame, the heat insulation frame is attached to the arrangement of the flame retardant pad, so that the polyethylene plate has a more effective high-temperature protection effect, and the limit clamping groove formed in the heat insulation plate is matched with the clamping block on the extrusion plate, so that the limit fixing effect can be increased when the polyethylene plate is fixed, the stability after the device is fixed is increased, and the arrangement of the limit spring has certain buffering property when the device is fixed, so that the protection effect on the plate is realized, and the influence of.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a heat shield panel according to the present invention in a perspective view;
FIG. 3 is a schematic cross-sectional view of a spacing clip according to the present invention;
FIG. 4 is a schematic side view of the structure of the stretching plate of the present invention.
In the figure: 1. a limiting clamp; 2. a heat insulation frame; 3. a retractable plate; 4. a slide rail; 5. a sliding plate; 6. adjusting the bolt; 7. a limiting spring; 8. a pressing plate; 9. a polyethylene sheet; 10. a heat insulation plate; 11. a limiting clamping groove; 12. a flame retardant pad; 13. a control bolt; 14. a support bar; 15. stretching the plate; 16. a clamping block; 17. dull polish bottom plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be a fixed connection or a movable connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-4, an embodiment of the invention provides a high temperature resistant ultra-high molecular weight polyethylene plate, which comprises a limiting clamp 1, a heat insulation frame 2 and a retractable plate 3, wherein the bottom of the limiting clamp 1 is fixedly connected with a support rod 14, the bottom of the support rod 14 is movably connected with a stretching plate 15, the bottom of the stretching plate 15 is provided with a frosted bottom plate 17, the inner wall of the heat insulation frame 2 is provided with a polyethylene plate 9, the upper surface and the bottom of the polyethylene plate 9 are both fixedly connected with a heat insulation plate 10, the surface of the heat insulation plate 10 is both provided with a limiting clamping groove 11, the surface of the heat insulation plate 10 is both fixedly connected with,
through the setting of thermal-insulated frame 2, thermal-insulated frame 2 plays clamping action to the polyethylene board 9 of its inner wall, and cooperation upper and lower surface heat insulating board 10's setting plays more comprehensive guard action to polyethylene board 9 to the setting of the fire-retardant pad 12 of laminating makes the polyethylene board have more effectual high temperature protection.
Spacing draw-in groove 11 that sets up on heat insulating board 10 and fixture block 16 phase-match on the stripper plate 8 to when fixing polyethylene sheet, can add its spacing fixed effect, add the stability after the device is fixed, thereby the setting of spacing spring 7 has certain cushioning nature when the device is fixed and has played the guard action to sheet, alleviates the extruded influence of hard thing.
Through the arrangement of the limiting clamp 1, the limiting clamp 1 can achieve the effect of pushing the sliding plate 5 and then the effect of pushing the extrusion plate 8 under the action of the sliding rail 4 by rotating the adjusting bolt 6, so that the extrusion plate 8 extrudes towards the bottom, therefore, the plate of the polyethylene plate can be clamped into the limiting clamp 1 in this way, the device has the function of limiting and fixing, the distance between the corresponding limiting clamps 1 on the device can be adjusted by adjusting the length of the expansion plate 3 through the control bolt 13, thereby being adjusted according to the use requirement, the arrangement of the stretching plate 15 plays a role of limiting assistance to the stretching of the stretching plate 3, the whole device can move and change along with the length change of the stretching plate 3, and the connection structure between the limiting clamp 1 is matched with the arrangement of the sanding bottom plate 17, so that the friction resistance of the bottom of the device is increased, and the device can reach a more stable use effect.
The detailed description of the known functions and the known components is omitted in the embodiment of the disclosure, and in order to ensure the compatibility of the equipment, the adopted operation means are consistent with the parameters of the instruments on the market.
In the invention, the working steps of the device are as follows:
1. through the setting of spacing clamp 1, accessible rotates adjusting bolt 6 under the effect of slide rail 4 on the spacing clamp 1, reach the effect that promotes sliding plate 5, then reach the effect that promotes stripper plate 8, make stripper plate 8 extrude to the bottom, consequently, the accessible this kind of mode is gone into spacing clamp 1 with the plate card of polyethylene board, play spacing fixed effect to it, accessible control bolt 13 adjusts the length of expansion plate 3 between the corresponding spacing clamp 1 on the device and adjusts the distance between the two, thereby can adjust according to the user demand, the setting of stretching plate 15 plays spacing supplementary effect to expansion plate 3's flexible, make the device wholly can remove the change along with expansion plate 3's length change, and the connection structure between the spacing clamp 1, cooperation dull polish bottom plate 17's setting, increase the frictional resistance of device bottom.
2. Through the setting of thermal-insulated frame 2, thermal-insulated frame 2 plays clamping action to the polyethylene board 9 of its inner wall, the cooperation is its setting of lower surface heat insulating board 10, play more comprehensive guard action to polyethylene board 9, and the setting of the fire-retardant pad 12 of laminating, make the polyethylene board have more effective high temperature guard action, and the spacing draw-in groove 11 that sets up on the heat insulating board 10 and the fixture block 16 phase-match on the stripper plate 8, thereby when fixing polyethylene board, can add its spacing fixed effect, add the stability after the device is fixed, spacing spring 7's setting, thereby the guard action to board has been played to certain cushioning nature when the device is fixed.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (6)
1. The utility model provides a high temperature resistance ultra high molecular polyethylene panel, includes spacing clamp (1), thermal-insulated frame (2) and expansion plate (3), its characterized in that: slide rail (4) have been seted up to the inside wall of spacing clamp (1), the inside swing joint of slide rail (4) has sliding plate (5), the upper surface swing joint of sliding plate (5) has adjusting bolt (6), the bottom swing joint of sliding plate (5) has spacing spring (7), the one end swing joint of spacing spring (7) has stripper plate (8).
2. The high temperature resistant ultra-high molecular weight polyethylene sheet according to claim 1, wherein: the inner wall of the heat insulation frame (2) is provided with a polyethylene plate (9), the upper surface and the bottom of the polyethylene plate (9) are fixedly connected with a heat insulation plate (10), the surface of the heat insulation plate (10) is provided with a limiting clamping groove (11), and the surface of the heat insulation plate (10) is fixedly connected with a flame retardant pad (12).
3. The high temperature resistant ultra-high molecular weight polyethylene sheet according to claim 1, wherein: the surface swing joint of expansion plate (3) has control bolt (13), the equal fixed connection in both ends of expansion plate (3) is spacing clamp (1) in addition.
4. The high temperature resistant ultra-high molecular weight polyethylene sheet according to claim 1, wherein: the bottom of the limiting clamp (1) is fixedly connected with a supporting rod (14), and the bottom of the supporting rod (14) is movably connected with a stretching plate (15).
5. The high temperature resistant ultra-high molecular weight polyethylene sheet according to claim 1, wherein: the bottom of the extrusion plate (8) is fixedly connected with a clamping block (16).
6. The high temperature resistant ultra-high molecular weight polyethylene sheet as claimed in claim 4, wherein: and a frosted bottom plate (17) is arranged at the bottom of the stretching plate (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110160023.9A CN112814977A (en) | 2021-02-05 | 2021-02-05 | High-temperature-resistant ultra-high molecular polyethylene plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110160023.9A CN112814977A (en) | 2021-02-05 | 2021-02-05 | High-temperature-resistant ultra-high molecular polyethylene plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112814977A true CN112814977A (en) | 2021-05-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110160023.9A Pending CN112814977A (en) | 2021-02-05 | 2021-02-05 | High-temperature-resistant ultra-high molecular polyethylene plate |
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| Country | Link |
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| CN (1) | CN112814977A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010022845A1 (en) * | 2010-06-07 | 2011-12-08 | Schletter Gmbh | Edge protection element for protecting edge of frameless photovoltaic module during assembling of module on support rail on e.g. diagonal roof, has integrated joint for arranging upper portion at lateral portion in pivotably movable manner |
| CN102501491A (en) * | 2011-11-23 | 2012-06-20 | 北京同益中特种纤维技术开发有限公司 | Polyethylene composite bulletproof plate and manufacturing method thereof |
| CN207147457U (en) * | 2017-07-04 | 2018-03-27 | 淮阴师范学院 | A kind of fixture for being used to measure bore inner diameter for being easy to fixation |
| CN108637565A (en) * | 2018-05-24 | 2018-10-12 | 安徽原动力生产力促进中心有限公司 | A kind of plank clamping device for welding convenient for adjusting |
| US20180334196A1 (en) * | 2016-06-20 | 2018-11-22 | Manuel ERLACHER | Mounting arrangement |
| US20190024397A1 (en) * | 2016-01-11 | 2019-01-24 | Jonathan Jonny Melic | System for anchoring a post to a concrete slab or other structure |
| CN209354489U (en) * | 2019-01-12 | 2019-09-06 | 江苏国伟兴塑胶科技有限公司 | A kind of engineering endurance board connecting equipment |
| CN210086527U (en) * | 2019-05-30 | 2020-02-18 | 福建省中保新材料科技有限公司 | Connecting device for installation based on insulation board |
| CN210263460U (en) * | 2019-07-02 | 2020-04-07 | 江西志广新材料科技有限公司 | Heat-insulating polystyrene board |
| CN210397336U (en) * | 2019-07-09 | 2020-04-24 | 漳浦县科炜达工业产品设计服务有限公司 | Glass fiber board mounting structure |
| CN210827884U (en) * | 2019-04-19 | 2020-06-23 | 瞿万超 | Novel building insulation board |
| CN211205549U (en) * | 2019-12-31 | 2020-08-07 | 柳州市妇幼保健院 | Adjustable thermometer fixer suitable for refrigerator |
-
2021
- 2021-02-05 CN CN202110160023.9A patent/CN112814977A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010022845A1 (en) * | 2010-06-07 | 2011-12-08 | Schletter Gmbh | Edge protection element for protecting edge of frameless photovoltaic module during assembling of module on support rail on e.g. diagonal roof, has integrated joint for arranging upper portion at lateral portion in pivotably movable manner |
| CN102501491A (en) * | 2011-11-23 | 2012-06-20 | 北京同益中特种纤维技术开发有限公司 | Polyethylene composite bulletproof plate and manufacturing method thereof |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210518 |
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