CN215935531U - Fertilizer, inorganic fertile disconnect-type seeding all-in-one of fertiliziing - Google Patents
Fertilizer, inorganic fertile disconnect-type seeding all-in-one of fertiliziing Download PDFInfo
- Publication number
- CN215935531U CN215935531U CN202121890884.4U CN202121890884U CN215935531U CN 215935531 U CN215935531 U CN 215935531U CN 202121890884 U CN202121890884 U CN 202121890884U CN 215935531 U CN215935531 U CN 215935531U
- Authority
- CN
- China
- Prior art keywords
- fertilizer
- inorganic
- hopper
- inorganic fertilizer
- injection unit
- 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.)
- Expired - Fee Related
Links
- 239000003337 fertilizer Substances 0.000 title claims abstract description 156
- 238000010899 nucleation Methods 0.000 title claims abstract description 20
- 239000003895 organic fertilizer Substances 0.000 claims abstract description 46
- 238000002347 injection Methods 0.000 claims abstract description 32
- 239000007924 injection Substances 0.000 claims abstract description 32
- 239000002689 soil Substances 0.000 claims abstract description 29
- 230000004720 fertilization Effects 0.000 claims abstract description 23
- 238000003971 tillage Methods 0.000 claims description 5
- 230000004888 barrier function Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 5
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 238000009331 sowing Methods 0.000 description 7
- 239000002361 compost Substances 0.000 description 6
- 230000035558 fertility Effects 0.000 description 4
- 235000015097 nutrients Nutrition 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005056 compaction Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000035784 germination Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Landscapes
- Sowing (AREA)
- Fertilizing (AREA)
Abstract
The utility model discloses an organic fertilizer and inorganic fertilizer separated type fertilizing and seeding integrated machine, which is sequentially provided with an organic fertilizer fertilizing device, an inorganic fertilizer fertilizing device and a seeding device along a walking direction; the bottom of fertilizer injection unit is provided with rotary cultivator attachment, inorganic fertilizer injection unit pass through the frame with fertilizer injection unit is fixed, inorganic fertilizer injection unit with seeder is fixed integral type structure, seeder is kept away from one side of inorganic fertilizer injection unit is provided with earthing device and the firming device that is used for the loam, the firming device sets up behind the earthing device. The device has solved fertilizer fertilization bulky, the unit weight is little, and the fertilization cost of labor is high, and it is inhomogeneous to fertilize, mixes with inorganic fertilizer and exerts and lead to the problem that inorganic fertilizer moisture absorption dissolves easily, and the device can realize the fertilizer fertilization, and inorganic fertilizer fertilizies, loosens the soil, and the seeding is once only accomplished, has reduced the cost of labor of planting the in-process, has saved the time.
Description
Technical Field
The utility model relates to the field of agricultural machinery, in particular to an organic fertilizer and inorganic fertilizer separated type fertilizing and sowing integrated machine.
Background
At present, the organic fertilizer is used less and less, the main reasons are that the organic fertilizer is large in size and smell, the fertilization with small unit weight is completely dependent on manpower, labor and time are wasted, and because the inorganic fertilizer can absorb moisture and be dissolved after the inorganic fertilizer is mixed with the organic fertilizer, the inorganic fertilizer cannot be used, so that a plurality of farmers abandon the use of the organic fertilizer and the use of the inorganic fertilizer. But the organic fertilizer has many advantages that the organic fertilizer is worthy of advocating use, has various types, wide sources and long fertilizer efficiency, contains most of nutrient elements which are organic matters, can improve the soil structure by applying the organic fertilizer, coordinates water, fertilizer, gas and heat in the soil, and improves the soil fertility and the soil productivity. The organic fertilizer is rich in organic substances and nutrient substances required by crop growth, can provide nutrients required by crop growth, improve soil, improve crop quality, increase crop yield, promote high and stable crop yield, maintain soil fertility, improve fertilizer utilization rate and reduce production cost. The organic fertilizer is fully and reasonably utilized, so that the crop yield can be increased, the soil fertility can be improved, the quality of agricultural products can be improved, and the effectiveness of soil nutrients can be improved. The method has important significance for promoting the harmonious and friendly development of agriculture and resources, agriculture and environment and human and nature, promoting the safe and clean production of agricultural products from the source and protecting the ecological environment.
Along with the improvement of the living standard of people, the demand of residents on safe, sanitary and pollution-free organic and green food is continuously increased, and vast farmers urgently need to apply organic fertilizers to improve the market competitiveness of agricultural products. The organic fertilizer is necessary for organic agriculture and ecological agriculture, can improve soil property, soil fertility, yield and quality of agricultural products and can inhibit environmental pollution. The country pays great attention to the production of organic fertilizers, and in recent years, the development of the organic fertilizers is supported by the inclination of policies. Therefore, the utility model discloses an integrated device capable of simultaneously applying organic fertilizer and inorganic fertilizer and sowing.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model provides the sowing integrated machine for the separated fertilization of the organic fertilizer and the inorganic fertilizer, and the device solves the problems that the organic fertilizer is large in fertilization volume, small in volume weight, high in fertilization labor cost and uneven in fertilization, and the inorganic fertilizer is easy to absorb moisture and dissolve when mixed with the inorganic fertilizer.
In order to achieve the purpose, the utility model provides an organic fertilizer and inorganic fertilizer separated fertilization seeding integrated machine, which is sequentially provided with an organic fertilizer fertilizing device, an inorganic fertilizer fertilizing device and a seeding device along the walking direction; the bottom of fertilizer injection unit is provided with rotary cultivator attachment, inorganic fertilizer injection unit pass through the frame with fertilizer injection unit is fixed, inorganic fertilizer injection unit with seeder is fixed integral type structure, seeder is kept away from one side of inorganic fertilizer injection unit is provided with earthing device and the firming device that is used for the loam, the firming device sets up behind the earthing device. The device has solved fertilizer fertilization bulky, the unit weight is little, and the fertilization cost of labor is high, and it is inhomogeneous to fertilize, mixes with inorganic fertilizer and exerts and lead to the problem that inorganic fertilizer moisture absorption dissolves easily, and the device can realize the fertilizer fertilization, and inorganic fertilizer fertilizies, loosens the soil, and the seeding is once only accomplished, has reduced the cost of labor of planting the in-process, has saved the time.
Preferably, fertilizer injection unit includes first structure frame and sets up first fertilizer bucket and guide plate on the first structure frame, first fertilizer bucket is used for saving the fertilizer, guide plate one end is connected first fertilizer bucket, the other end are provided with the discharge gate, the discharge gate sets up rotary cultivator attachment front end.
Preferably, a first quantity control switch is arranged between the first fertilizer hopper and the guide plate and used for controlling the discharge flow of the organic fertilizer.
Preferably, be provided with the spiral auger in the first fertilizer hopper, the spiral auger is used for carrying the fertilizer for the guide plate.
Preferably, the fertilizer applying device further comprises a second structural frame fixedly connected with the first structural frame, and the inorganic fertilizer applying device and the seeding device are arranged on the second structural frame.
Preferably, inorganic fertile fertilizer injection unit includes second compost fill, first honeycomb duct and first a plough foot, the second compost fill is used for the inorganic fertile fertilizer of storage, first honeycomb duct one end is connected second compost fill, the other end is connected first a plough foot, first a plough foot sets up behind the rotary cultivator attachment.
Preferably, a second quantity control switch is arranged between the second fertilizer hopper and the first flow guide pipe and is used for controlling the discharge flow of the inorganic fertilizer.
Preferably, the seeder includes seed fill, second honeycomb duct and second a plough foot, the seed fill is used for the storage seed, second honeycomb duct one end is connected seed fill, the other end is connected the second a plough foot, the second a plough foot sets up earthing device with between the first a plough foot.
Preferably, a third control switch is arranged between the seed hopper and the second flow guide pipe, and the third control switch is used for controlling the discharging flow of the seeds.
Preferably, the second fertilizer hopper with the seed hopper is fixed integral type structure, the second fertilizer hopper with be provided with the baffler between the seed hopper.
The utility model has the beneficial effects that: compared with the prior art, the utility model provides the sowing integrated machine for the separated fertilization of the organic fertilizer and the inorganic fertilizer, wherein an organic fertilizer fertilizing device, an inorganic fertilizer fertilizing device and a sowing device are sequentially arranged along the walking direction; the bottom of fertilizer injection unit is provided with rotary cultivator attachment, inorganic fertilizer injection unit pass through the frame with fertilizer injection unit is fixed, inorganic fertilizer injection unit with seeder is fixed integral type structure, seeder is kept away from one side of inorganic fertilizer injection unit is provided with earthing device and the firming device that is used for the loam, the firming device sets up behind the earthing device. The device has solved fertilizer fertilization bulky, the unit weight is little, and the fertilization cost of labor is high, and it is inhomogeneous to fertilize, mixes with inorganic fertilizer and exerts and lead to the problem that inorganic fertilizer moisture absorption dissolves easily, and the device can realize the fertilizer fertilization, and inorganic fertilizer fertilizies, loosens the soil, and the seeding is once only accomplished, has reduced the cost of labor of planting the in-process, has saved the time.
Drawings
FIG. 1 is a perspective view of the structure of the present invention;
fig. 2 is a side view of the present invention.
FIG. 3 is a front view of the present invention;
fig. 4 is a structural view of the present invention.
Description of the symbols of the main elements: 1. an organic fertilizer application device; 2. an inorganic fertilizer application device; 3. a seeding device; 4. a soil covering device; 5. a soil compacting device; 6. a universal joint; 11. a rotary tillage device; 12. a baffle; 21. a first drill barrow foot; 31. a second drill barrow foot.
Detailed Description
In order to more clearly describe the present invention, the present invention will be further described with reference to the accompanying drawings.
Example 1: referring to fig. 1 to 4, in the sowing integrated machine for separately applying fertilizer to organic fertilizer and inorganic fertilizer according to the present embodiment, an organic fertilizer applying device 1, an inorganic fertilizer applying device 2, and a sowing device 3 are sequentially disposed along a traveling direction; the bottom of fertilizer injection unit 1 is provided with rotary cultivator attachment 11, and inorganic fertilizer injection unit 2 is fixed through frame and fertilizer injection unit 1, and inorganic fertilizer injection unit 2 and seeder 3 formula structures as fixed integral type, and one side that inorganic fertilizer injection unit 2 was kept away from to seeder 3 is provided with earthing device 4 and the device of firming 5 that is used for the loam, and the device of firming 5 sets up after earthing device 4. The device has solved fertilizer fertilization bulky, the unit weight is little, and the fertilization cost of labor is high, and it is inhomogeneous to fertilize, mixes with inorganic fertilizer and exerts and lead to the problem that inorganic fertilizer moisture absorption dissolves easily, and the device can realize the fertilizer fertilization, and inorganic fertilizer fertilizies, loosens the soil, and the seeding is once only accomplished, has reduced the cost of labor of planting the in-process, has saved the time.
Example 2: the fertilizer injection unit 1 of this embodiment includes first structure frame and sets up first fertilizer hopper and guide plate 12 on first structure frame, and first fertilizer hopper is used for saving the fertilizer, and first fertilizer hopper is connected to guide plate 12 one end, the other end is provided with the discharge gate, and the discharge gate setting is at 11 front ends of rotary cultivator attachment. A first quantity control switch is arranged between the first fertilizer hopper and the guide plate 12, and the first quantity control switch is used for controlling the discharge flow of the organic fertilizer. The first fertilizer hopper of this embodiment is provided with the spiral auger in, and the spiral auger is used for carrying fertilizer to give guide plate 12.
Example 3: the embodiment also comprises a second structural frame for fixedly connecting the first structural frame, and the inorganic fertilizer fertilizing device 2 and the seeding device 3 are both arranged on the second structural frame. The inorganic fertilizer injection unit 2 of this embodiment includes second compost fill, first honeycomb duct and first an animal-drawn seed plough foot 21, and the second compost fill is used for the inorganic fertilizer of storage, and first honeycomb duct one end is connected the second compost fill, and first an animal-drawn seed plough foot 21 is connected to the other end, and first an animal-drawn seed plough foot 21 sets up behind rotary cultivator attachment 11. A second quantity control switch is arranged between the second fertilizer hopper and the first flow guide pipe, and the second quantity control switch is used for controlling the discharge flow of inorganic fertilizer.
Example 4: the seeding device 3 of this embodiment includes seed hopper, second honeycomb duct and second an animal-drawn seed plough foot 31, and the seed hopper is used for the storage seed, and second honeycomb duct one end is connected the seed hopper, and the second an animal-drawn seed plough foot 31 is connected to the other end, and second an animal-drawn seed plough foot 31 sets up between earthing device 4 and first an animal-drawn seed plough foot 21. A third control switch is arranged between the seed hopper and the second flow guide pipe, and the third control switch is used for controlling the discharge flow of the seeds. The second fertilizer hopper and the seed hopper of this embodiment are fixed integral type structure, are provided with the baffler between second fertilizer hopper and the seed hopper.
Example 5: in fertilizer injection unit 1, be provided with universal joint 6 that is used for connecting the tractor, can provide power for the rotary cultivator, rotary cultivator attachment 11 is connected with the hydraulic stem on the tractor simultaneously, realizes the lift of whole equipment through the hydraulic stem on the tractor, makes things convenient for the whole device in field to turn around. Because the fertilizer has the sticky characteristics, so two spiral augers of design guarantee that the fertilizer can pass through first accuse volume switch smoothly in first fertilizer hopper, and the power of spiral auger is passed through the chain by rotary cultivator attachment 11 and is transmitted the auger axle. The organic fertilizer application amount is adjusted through a first quantity control switch, the organic fertilizer is uniformly scattered in front of the rotary cultivator through the guide plate 12 after passing through the first quantity control switch, then the organic fertilizer and the soil are further stirred while the rotary cultivator carries out rotary tillage on the soil, and the inorganic fertilizer and the soil are fully mixed while loosening the soil.
Example 6: in inorganic fertile fertilizer injection unit 2 and seeder 3, second structure frame is fixed with fertilizer injection unit 1, makes the tractor can lift whole equipment when turning round, conveniently turns round when the field operation. The second fertilizer hopper and the seed hopper are separated from each other by a separation plate, and each discharge port is connected with the flow guide pipe through a control switch below the discharge port. The quantity control switch is driven to rotate by the rotation of the quantity control wheel through a chain, so that the seeding density is controlled. The guide tube guides the seeds and the inorganic fertilizer into the second drill barrow foot 31 and the first drill barrow foot 21 respectively. First drill barrow foot 21 is inorganic fertilizer, and second drill barrow foot 31 is the seed, and first drill barrow foot 21 is in the 8cm department on second drill barrow foot 31 right side to guarantee that inorganic fertilizer and seed are not mutual contact, avoid appearing burning the phenomenon of seedling. After fertilizer is applied and sowed, the soil covering device 4 covers soil, and then the compaction device compacts to ensure that the fertilizer and seeds are completely buried in the soil, so that the fertilizer can be prevented from volatilizing, and the germination rate of the seeds is improved.
Example 7: first, the apparatus of the present embodiment is mounted on an agricultural tractor, the universal joint 6 is connected to the output structure of the tractor, and the rotary cultivator 11 is connected to the hydraulic mechanism of the tractor. Then, an organic fertilizer is filled into a first fertilizer hopper, an inorganic fertilizer and seeds are respectively filled into a second fertilizer hopper and a seed hopper, and finally, an organic fertilizer quantity control switch, an inorganic fertilizer quantity control switch and a seed quantity control switch are respectively adjusted according to requirements. After the adjustment is completed, the whole hydraulic mechanism of the tractor is lifted, then the tractor is driven into the land to be cultivated, the equipment is put down to start cultivation, and when the fertilizer or seeds in the hopper are insufficient, the fertilizer or seeds are continuously added into the hopper. During cultivation, the organic fertilizer flows out from the quantity control switch and is evenly scattered on the bottom edge, then the rotary cultivator carries out rotary tillage on the soil to enable the organic fertilizer to be evenly mixed with the soil, then inorganic fertilizer and seeds pass through the quantity control switch and are guided into the drill barrow foot through the guide pipe, and the drill barrow foot buries the fertilizer and the seeds into the soil respectively. The following earthing device 4 then coats the seeds and fertilizer with soil and finally the compaction structure compacts the soil surface.
The above disclosure is only for a few specific embodiments of the present invention, but the present invention is not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.
Claims (10)
1. An organic fertilizer and inorganic fertilizer separated fertilization seeding integrated machine is characterized in that an organic fertilizer fertilizing device, an inorganic fertilizer fertilizing device and a seeding device are sequentially arranged along a walking direction; the bottom of fertilizer injection unit is provided with rotary cultivator attachment, inorganic fertilizer injection unit pass through the frame with fertilizer injection unit is fixed, inorganic fertilizer injection unit with seeder is fixed integral type structure, seeder is kept away from one side of inorganic fertilizer injection unit is provided with earthing device and the firming device that is used for the loam, the firming device sets up behind the earthing device.
2. The all-in-one machine for separately fertilizing organic fertilizer and inorganic fertilizer as claimed in claim 1, wherein the organic fertilizer fertilizing device comprises a first structural frame, a first fertilizer hopper and a guide plate, the first fertilizer hopper and the guide plate are arranged on the first structural frame, the first fertilizer hopper is used for storing organic fertilizer, one end of the guide plate is connected with the first fertilizer hopper, the other end of the guide plate is provided with a discharge hole, and the discharge hole is arranged at the front end of the rotary tillage device.
3. The all-in-one machine for separately fertilizing organic fertilizer and inorganic fertilizer as claimed in claim 2, wherein a first quantity control switch is arranged between the first fertilizer hopper and the guide plate, and the first quantity control switch is used for controlling the discharge flow of the organic fertilizer.
4. The all-in-one machine for separately fertilizing organic fertilizer and inorganic fertilizer as claimed in claim 2, wherein a spiral auger is arranged in the first fertilizer hopper, and the spiral auger is used for conveying the organic fertilizer to the guide plate.
5. The integrated fertilizer and fertilizer drill and seeder with separated fertilization of organic fertilizer and inorganic fertilizer as claimed in claim 2, further comprising a second structural frame for fixedly connecting the first structural frame, wherein the inorganic fertilizer application device and the seeder are both arranged on the second structural frame.
6. The all-in-one seeder with separated organic fertilizer and inorganic fertilizer application as claimed in claim 5, wherein the inorganic fertilizer application device comprises a second fertilizer hopper, a first guide pipe and a first drill barrow foot, the second fertilizer hopper is used for storing inorganic fertilizer, one end of the first guide pipe is connected with the second fertilizer hopper, the other end of the first guide pipe is connected with the first drill barrow foot, and the first drill barrow foot is arranged behind the rotary tillage device.
7. The all-in-one machine for separately fertilizing organic fertilizer and inorganic fertilizer as claimed in claim 6, wherein a second quantity control switch is arranged between the second fertilizer hopper and the first flow guide pipe, and the second quantity control switch is used for controlling the discharge flow of inorganic fertilizer.
8. The all-in-one fertilizer and inorganic fertilizer separated fertilization and seeding machine as claimed in claim 6, wherein the seeding device comprises a seed hopper, a second flow guide pipe and a second drill barrow foot, the seed hopper is used for storing seeds, one end of the second flow guide pipe is connected with the seed hopper, the other end of the second flow guide pipe is connected with the second drill barrow foot, and the second drill barrow foot is arranged between the soil covering device and the first drill barrow foot.
9. The all-in-one machine for organic fertilizer and inorganic fertilizer separated fertilization and seeding as claimed in claim 8, wherein a third control switch is arranged between the seed hopper and the second guide pipe and used for controlling the discharge flow of seeds.
10. The all-in-one machine for separately fertilizing organic fertilizer and inorganic fertilizer as claimed in claim 9, wherein the second fertilizer hopper and the seed hopper are of a fixed integrated structure, and a barrier plate is arranged between the second fertilizer hopper and the seed hopper.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202121890884.4U CN215935531U (en) | 2021-08-12 | 2021-08-12 | Fertilizer, inorganic fertile disconnect-type seeding all-in-one of fertiliziing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202121890884.4U CN215935531U (en) | 2021-08-12 | 2021-08-12 | Fertilizer, inorganic fertile disconnect-type seeding all-in-one of fertiliziing |
Publications (1)
Publication Number | Publication Date |
---|---|
CN215935531U true CN215935531U (en) | 2022-03-04 |
Family
ID=80431947
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202121890884.4U Expired - Fee Related CN215935531U (en) | 2021-08-12 | 2021-08-12 | Fertilizer, inorganic fertile disconnect-type seeding all-in-one of fertiliziing |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN215935531U (en) |
-
2021
- 2021-08-12 CN CN202121890884.4U patent/CN215935531U/en not_active Expired - Fee Related
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN203575033U (en) | Multifunctional planter for plastic film mulching dry cultivation of paddy rice | |
CN102626009B (en) | Multilayer stubble-cleaning rotary-cultivation fertilizing seeding machine | |
CN206423072U (en) | A kind of ferti-seeding integration apparatus | |
CN204579077U (en) | The capable clear bar clay fertilizer of a kind of maize seed revolves mixed single two adjustable cave sower of spreading manuer in holes of strain | |
CN107347540A (en) | A kind of saving water, resisting drought type rice is without plate method of raising seedling | |
CN104541630A (en) | Layered deep fertilization and equal-depth fertilizer spreading machine | |
CN103141189A (en) | Device and method for seeding and fertilizing in dry farming of paddies | |
CN107079638A (en) | A kind of hand propelled automatic spacing mixed seeding device and its application method | |
WO2017136988A1 (en) | Fertilizer mixing device | |
CN202476073U (en) | Seeder | |
CN207626029U (en) | A kind of hillside Chinese medicine combined seed and fertilizer drill | |
CN206517759U (en) | A kind of layer-by-layer fertilizing seeder | |
CN206226971U (en) | A kind of same broadcasting device of integrated application rate of peanut seed fertilizer medicine | |
CN107148826A (en) | A kind of hand propelled automatic spacing mixed seeding device | |
CN202524728U (en) | Stubble cleaning, rotary tillage and multi-layer fertilization seeder | |
CN203120432U (en) | Device for seeding and fertilizing paddies planted in dry farmland | |
CN101283643B (en) | Multi-functional seeder | |
CN205213322U (en) | Potato seeding laminating machine | |
CN204907062U (en) | Seeding fertilization integration seeder | |
CN210075989U (en) | Ditching fertilizer distributor | |
CN215935531U (en) | Fertilizer, inorganic fertile disconnect-type seeding all-in-one of fertiliziing | |
CN106888635A (en) | A kind of plateau mountain area seeding apparatus | |
CN207754042U (en) | A kind of agricultural equipment seeding apparatus | |
CN207802745U (en) | A kind of small-sized wheat seeder of sprinkling water | |
CN203446195U (en) | Farmland plantation management integrated machine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220304 |