CN213719070U - Recyclable heat-preservation mulching film - Google Patents
Recyclable heat-preservation mulching film Download PDFInfo
- Publication number
- CN213719070U CN213719070U CN202022684787.1U CN202022684787U CN213719070U CN 213719070 U CN213719070 U CN 213719070U CN 202022684787 U CN202022684787 U CN 202022684787U CN 213719070 U CN213719070 U CN 213719070U
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- Prior art keywords
- film
- supporting
- mulching film
- soil
- plastic film
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- 238000004321 preservation Methods 0.000 title claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims abstract description 56
- 235000002637 Nicotiana tabacum Nutrition 0.000 claims abstract description 47
- 241000208125 Nicotiana Species 0.000 claims abstract description 35
- 239000002689 soil Substances 0.000 claims abstract description 32
- 238000003825 pressing Methods 0.000 claims abstract description 11
- 239000012528 membrane Substances 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000002362 mulch Substances 0.000 claims 3
- 238000009413 insulation Methods 0.000 claims 2
- 239000002985 plastic film Substances 0.000 abstract description 25
- 229920006255 plastic film Polymers 0.000 abstract description 25
- 244000061176 Nicotiana tabacum Species 0.000 abstract description 12
- 230000012010 growth Effects 0.000 abstract description 8
- 238000009423 ventilation Methods 0.000 abstract description 7
- 238000003900 soil pollution Methods 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 240000009088 Fragaria x ananassa Species 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002786 root growth Effects 0.000 description 1
- 235000021012 strawberries Nutrition 0.000 description 1
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- Protection Of Plants (AREA)
Abstract
The utility model relates to a recyclable heat-preservation mulching film, which comprises two supporting mechanisms arranged on two sides of the tobacco ridge in the width direction, wherein each supporting mechanism is formed by splicing a plurality of supporting plates; still including setting up the plastic film mechanism on strutting the mechanism, plastic film mechanism covers the plastic film unit of two corresponding supporting plate top surfaces including the several, and the plastic film unit includes the stereoplasm membrane area of two parallel arrangement and sets up the film between two stereoplasm membrane areas to and set up on propping up the backplate and be used for pressing the stereoplasm membrane area both ends in the mechanism of drawing and pressing at two corresponding backplate top borders of strutting the mechanism. The utility model discloses simple structure not only can reuse, reduces the damage of plastic film and to the soil pollution in field by a wide margin, and it is convenient to install, adjust, dismantle the operation simultaneously, on the basis that does not influence the heat preservation function, can in time realize the soil ventilation cooling under the membrane, guarantees the growth efficiency and the development quality of tobacco plant.
Description
Technical Field
The utility model belongs to tobacco planting equipment field especially relates to a cyclic utilization's heat preservation plastic film.
Background
The plastic film that the plastic film is very thin mainly utilized covers the soil that the crop grows, so can keep warm to the soil and keep fertile, and plastic film mulching cultivation among the prior art has been the very mature crop cultivation technique, but along with the extensive use of plastic film and the rate of recovery of plastic film is lower, has led to the plastic film pollution of field to aggravate gradually. Especially, the use of the ultrathin mulching film has insufficient physical strength due to too small thickness, and the phenomena of cracking, aging, weathering and the like easily occur in the growth process of crops, so that the ultrathin mulching film cannot be effectively recycled.
Some technical concepts of hard mulching films are proposed in the prior art, for example, patent documents with publication numbers CN205546759U, CN207978541U, and CN208783373U, and the like, although a covering structure with large thickness and high hardness is provided to realize the reuse of the structure so as to prevent the phenomenon of pollution caused by weathering and breakage, the technical scheme is more like the reduction of a greenhouse structure, the practicability of covering soil as a mulching film is poor, meanwhile, the mulching film also needs to be subjected to hole breaking and seedling digging operations such as strawberries and tobacco plants when in use, and for crops with long growth time and large volume such as tobacco, the mulching film needs to be separated from ridge soil to be uncovered in the middle stage of growth of the tobacco plants, namely, the mulching film is not needed, and the hard mulching film in the prior art cannot realize the above functions.
Meanwhile, when the tobacco plants are transplanted in the period of mulching film covering for 4-5 months, the temperature difference between day and night in the field is large, the soil under the root of the tobacco plants is rapidly heated by strong light in the daytime, the temperature is higher than 50 ℃, the mulching film needs to be torn off in time to ventilate and radiate so as to prevent the roots of the tobacco plants from being injured, but the heat preservation effect of the mulching film is directly damaged, and a tobacco grower needs to align the torn mulching film again at night and cover the mulching film with soil to keep the heat preservation effect of the mulching film as much as possible so as to resist the low temperature at night. The whole operation not only consumes labor and time, but also influences the growth of tobacco plants, and is easy to slow down the growth speed of the tobacco plants and reduce the development quality of leaves.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a but cyclic utilization's heat preservation plastic film, the utility model discloses simple structure not only can reuse, reduces the damage of plastic film by a wide margin and to the soil pollution in field, and it is convenient to install, adjust, dismantle the operation simultaneously, on the basis that does not influence the heat preservation function, can in time realize the soil ventilation cooling under the film, guarantees the growth efficiency and the development quality of tobacco plant.
In order to solve the technical problem, the utility model discloses a technical scheme as follows:
a recyclable heat-preservation mulching film comprises two supporting mechanisms arranged on two sides of a tobacco ridge in the width direction, wherein each supporting mechanism is formed by splicing a plurality of supporting plates, and the supporting plates of the two supporting mechanisms are correspondingly arranged;
the mulching film mechanism is arranged on the supporting mechanism and comprises a plurality of mulching film units covering the top surfaces of two corresponding supporting plates, each mulching film unit comprises two hard film belts arranged in parallel and a film arranged between the two hard film belts, and the end parts of the hard film belts are provided with pull belts;
the device also comprises a pulling and pressing mechanism which is arranged on the supporting plate and used for pressing two ends of the hard film belt against the top edges of the corresponding supporting plates of the two supporting mechanisms.
Preferably, the drawstrings at the ends of the two hard film belts in the same direction are respectively fixedly connected with the outer wall of the pull cylinder, threaded rods are coaxially and fixedly arranged at the opposite ends of the two pull cylinders, and the threads of the two threaded rods are in opposite rotation directions and are matched with the threads of the same sleeve.
Preferably, the two threaded rods are sleeved with first limiting springs, and two ends of each first limiting spring respectively push against corresponding ports of the sleeve and the pull cylinder and are constantly in a compressed state.
Preferably, draw the pressure mechanism including setting up two recesses on the supporting plate, slide in the recess and set the briquetting, the briquetting top is equipped with the spacing spring of second that is in by compression state, and the briquetting surface is equipped with and exposes to the external drag hook of recess, and the drag hook is the form of bending downwards and is used for the cooperation the sleeve.
Preferably, in deviating from to the side of two stereoplasm membrane areas, a side is equipped with the assembly sand grip, and opposite side is equipped with the assembly recess with the assembly sand grip complex of side plastic film unit.
Preferably, the two sides of the supporting and protecting plate are respectively provided with an assembling clamping strip and an assembling clamping groove, and the top of the corresponding supporting and protecting plate of the two supporting and protecting mechanisms is inclined in opposite directions, and the bottom of the corresponding supporting and protecting plate is away from the supporting and protecting mechanism.
Preferably, the bottom of the supporting and protecting plate is fixedly provided with a soil pricking rod, the soil pricking rod is perpendicular to the horizontal plane and is circumferentially provided with a plurality of soil pricking nails.
Preferably, the soil pricking nail is bent upwards.
Preferably, the hard film strip is made of transparent plastic with the thickness of 1mm, and the support plate is made of black PVC material.
The utility model discloses the use as follows:
the method comprises the following steps of firstly selecting a corresponding number of supporting plates according to the length of a tobacco ridge, inserting and matching the assembling clamping strips of the supporting plates with the assembling clamping grooves of adjacent supporting plates, operating in sequence to form supporting mechanisms, supporting the two supporting mechanisms against two sides of the tobacco ridge, and keeping the supporting plates of the two supporting mechanisms in pairwise corresponding arrangement. And finally, pricking the soil pricking rod at the bottom of the support guard plate into the ground to finish the installation of the support mechanism. Because the soil pricking nail of the soil pricking rod is bent upwards, the resistance of the soil pricking rod when being pricked into the ground is not too large, but the resistance of the soil pricking rod when being pulled out is improved, so that the connection stability of the support guard plate and the ground can be ensured. Meanwhile, the ridge can be formed through machinery firstly, then the supporting mechanism is arranged, the supporting mechanism can also be arranged firstly, and then the machinery is used for filling soil into the space between the two supporting mechanisms to form the tobacco ridge. Because the standardization and refinement requirements of the current tobacco planting, the width and the spacing of tobacco ridges, and the depth, the diameter and the spacing of the transplanting tobacco holes have specific parameter requirements, the arrangement of the supporting mechanism can be completely relied on.
After the tobacco seedlings are transplanted into the tobacco ridges, the two ends of each mulching film unit are placed at the tops of the two corresponding guard plates, then the sleeves at one ends of the mulching film units are matched with the draw hooks on the corresponding support plates, meanwhile, the draw hooks on the other guard plate overcome the elastic force of the second limiting spring to push upwards, then the mulching film units are tensioned, and the sleeves at the other ends of the mulching film units are matched with the draw hooks of the corresponding support plates. Because the second limiting spring is in a compressed state at any time, the second limiting spring keeps a state of pushing the draw hooks downwards at any time, and the mulching film unit is pressed against the top edges of the two protective plates under the tightening action of the draw hooks of the two protective plates. Meanwhile, each mulching film unit is matched with the corresponding assembly convex strip and the assembly groove, so that a complete mulching film mechanism is formed, and the gap between the two protection mechanisms is well sealed. Finally, the two ends of the tobacco ridge are covered by common mulching films in a matching manner, so that a complete mulching film structure capable of covering tobacco seedlings is formed. It should be noted that the film of plastic film unit should be arranged in the place where the tobacco seedling is located, so that the punching, seedling picking and film uncovering operation of the film is realized after the tobacco seedling grows for a certain time.
When needing to carry out the below-film ventilation, rotatory sleeve, because first spacing spring is in compressed state constantly, so its axial ejection effort to sleeve and pull cylinder makes the pull cylinder as far as possible unable along with telescopic rotation and rotates, simultaneously because the length of plastic film unit self is fixed, so also can prevent effectively that the pull cylinder from appearing along with the rotatory trend of sleeve. In addition, the thread turning directions of the two threaded rods are opposite, so that the threaded rods rotate to drive the pull cylinder to move axially in opposite directions, and further drive the two hard film belts to move in opposite directions, so that the gaps between the two adjacent film units at the exposed positions are exposed, and ventilation and heat dissipation are realized. When heat preservation is needed, the sleeve is rotated reversely, the mulching film unit resets and is closed, the temperature under the film is kept, and the low temperature at night is resisted.
Compared with the prior art, the utility model, have following advantage:
1) the utility model discloses simple structure adopts stereoplasm membrane area cooperation film to constitute the plastic film unit, and several plastic film unit constitutes plastic film structure: the hard film belt is not easy to crack and weather and can be repeatedly used; the use of the film can reduce the cost, the subsequent seedling picking and film uncovering operation can not be influenced, and meanwhile, the film is connected with the hard film belt, so that the film has better integrity after being disassembled, is convenient to collect and recycle, and can not be left in the field to cause soil pollution;
2) because the requirement of transplanting the tobacco seedlings is to dig big holes and water, mechanical hole digging is mostly adopted, ridge soil of the tobacco ridges falls randomly easily, the tobacco ridges can be effectively supported by the arrangement of the supporting plates, the shape, the height and the thickness of the tobacco ridges can be effectively kept no matter in the process of ridging, hole digging or water and fertilizer dressing for a plurality of times in the later period, and the basic environment for root growth of tobacco plants is ensured. Meanwhile, the supporting and protecting plates are black, so that the heat can be absorbed and the temperature can be raised under the illumination, and the weeds and other crops on the ridge side can be killed;
3) every plastic film unit all can take place deformation to expose the clearance between the plastic film unit, can in time realize the soil ventilation heat dissipation under the membrane. Meanwhile, the tobacco plant can be reset to form a complete structure, and the heat preservation and soil moisture preservation operation is continuously carried out on the environment under the film, so that the growth efficiency and the development quality of the tobacco plants are ensured.
Drawings
Fig. 1 is a schematic structural view of a recyclable heat-insulating mulching film in a specific embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, but cyclic utilization's heat preservation plastic film, including being used for setting up two protection mechanism 1 in tobacco ridge width direction both sides, support mechanism 1 and form and two supporting plate 11 that protect the mechanism by the concatenation of several supporting plate 11 are corresponding the setting, the both sides of supporting plate 11 are equipped with assembly card strip 12 and assembly draw-in groove 13 respectively, and two corresponding supporting plate 11 of protection mechanism 1, and its top subtend slope, bottom keep away from the setting dorsad, and supporting plate 11 bottom is fixed and is equipped with prick native pole 4, pricks native pole 4 vertical horizontal plane setting and pricks and is equipped with the several on native pole 4 and prick native nail 41, prick native nail 41 and be the setting of upwards bending.
The mulching film mechanism 2 is arranged on the supporting mechanism 1, the mulching film mechanism 2 comprises a plurality of mulching film units 2 covering the top surfaces of two corresponding supporting guard plates 11, each mulching film unit 2 comprises two hard film belts 21 arranged in parallel and a film 22 arranged between the two hard film belts 21, a pull belt 25 is arranged at the end part of each hard film belt 21, the two hard film belts 21 deviate from the side edges, an assembly convex strip 23 is arranged on one side edge, and an assembly groove 24 matched with the assembly convex strip 23 of the side mulching film unit is arranged on the other side edge; the stretching strap 25 of two hard film belt 21 syntropy tip respectively with a 31 outer wall fixed connection of drawing, two opposite direction tip that draw a 31 all coaxial threaded rod 32 that has set firmly, the screw thread of two threaded rods 32 is revolved to opposite and in same sleeve 34 screw-thread fit, the cover is equipped with first spacing spring 33 on two threaded rods 32, and first spacing spring 33 both ends are in by compression state respectively to the corresponding port that touches sleeve 34 and draw a 34.
Still including setting up on a backplate 11 and being used for pressing the carbide film area both ends in the corresponding pressure mechanism that draws on backplate top border of two protection mechanisms, draw pressure mechanism including setting up two recesses 35 on a backplate, sliding in recess 35 and having set briquetting 36, briquetting 36 top is equipped with the spacing spring 38 of second that is in by compression state, and briquetting 36 surfaces are equipped with exposes to the external drag hook 37 of recess, and drag hook 37 is the form of bending downwards and is used for the cooperation sleeve 34.
The hard film belt 21 is made of transparent plastic with the thickness of 1mm, and the support plate 11 is made of black PVC material.
The utility model discloses the use as follows:
the method comprises the following steps of firstly selecting a corresponding number of supporting plates according to the length of a tobacco ridge, inserting and matching the assembling clamping strips of the supporting plates with the assembling clamping grooves of adjacent supporting plates, operating in sequence to form supporting mechanisms, supporting the two supporting mechanisms against two sides of the tobacco ridge, and keeping the supporting plates of the two supporting mechanisms in pairwise corresponding arrangement. And finally, pricking the soil pricking rod at the bottom of the support guard plate into the ground to finish the installation of the support mechanism. Because the soil pricking nail of the soil pricking rod is bent upwards, the resistance of the soil pricking rod when being pricked into the ground is not too large, but the resistance of the soil pricking rod when being pulled out is improved, so that the connection stability of the support guard plate and the ground can be ensured. Meanwhile, the ridge can be formed through machinery firstly, then the supporting mechanism is arranged, the supporting mechanism can also be arranged firstly, and then the machinery is used for filling soil into the space between the two supporting mechanisms to form the tobacco ridge. Because the standardization and refinement requirements of the current tobacco planting, the width and the spacing of tobacco ridges, and the depth, the diameter and the spacing of the transplanting tobacco holes have specific parameter requirements, the arrangement of the supporting mechanism can be completely relied on.
After the tobacco seedlings are transplanted into the tobacco ridges, the two ends of each mulching film unit are placed at the tops of the two corresponding guard plates, then the sleeves at one ends of the mulching film units are matched with the draw hooks on the corresponding support plates, meanwhile, the draw hooks on the other guard plate overcome the elastic force of the second limiting spring to push upwards, then the mulching film units are tensioned, and the sleeves at the other ends of the mulching film units are matched with the draw hooks of the corresponding support plates. Because the second limiting spring is in a compressed state at any time, the second limiting spring keeps a state of pushing the draw hooks downwards at any time, and the mulching film unit is pressed against the top edges of the two protective plates under the tightening action of the draw hooks of the two protective plates. Meanwhile, each mulching film unit is matched with the corresponding assembly convex strip and the assembly groove, so that a complete mulching film mechanism is formed, and the gap between the two protection mechanisms is well sealed. Finally, the two ends of the tobacco ridge are covered by common mulching films in a matching manner, so that a complete mulching film structure capable of covering tobacco seedlings is formed. It should be noted that the film of plastic film unit should be arranged in the place where the tobacco seedling is located, so that the punching, seedling picking and film uncovering operation of the film is realized after the tobacco seedling grows for a certain time.
When needing to carry out the below-film ventilation, rotatory sleeve, because first spacing spring is in compressed state constantly, so its axial ejection effort to sleeve and pull cylinder makes the pull cylinder as far as possible unable along with telescopic rotation and rotates, simultaneously because the length of plastic film unit self is fixed, so also can prevent effectively that the pull cylinder from appearing along with the rotatory trend of sleeve. In addition, the thread turning directions of the two threaded rods are opposite, so that the threaded rods rotate to drive the pull cylinder to move axially in opposite directions, and further drive the two hard film belts to move in opposite directions, so that the gaps between the two adjacent film units at the exposed positions are exposed, and ventilation and heat dissipation are realized. When heat preservation is needed, the sleeve is rotated reversely, the mulching film unit resets and is closed, the temperature under the film is kept, and the low temperature at night is resisted.
Claims (9)
1. A recyclable heat-preservation mulching film is characterized by comprising two supporting mechanisms arranged on two sides of a tobacco ridge in the width direction, wherein each supporting mechanism is formed by splicing a plurality of supporting plates, and the supporting plates of the two supporting mechanisms are correspondingly arranged;
the mulching film mechanism is arranged on the supporting mechanism and comprises a plurality of mulching film units covering the top surfaces of two corresponding supporting plates, each mulching film unit comprises two hard film belts arranged in parallel and a film arranged between the two hard film belts, and the end parts of the hard film belts are provided with pull belts;
the device also comprises a pulling and pressing mechanism which is arranged on the supporting plate and used for pressing two ends of the hard film belt against the top edges of the corresponding supporting plates of the two supporting mechanisms.
2. The recyclable heat-insulating mulching film as claimed in claim 1, wherein the pull tapes at the same direction ends of the two hard film tapes are fixedly connected with the outer walls of the pulling cylinders respectively, the opposite ends of the two pulling cylinders are fixedly provided with threaded rods coaxially, and the threads of the two threaded rods have opposite rotation directions and are matched with the threads of the same sleeve.
3. The recyclable heat-insulating mulching film as claimed in claim 2, wherein the two threaded rods are sleeved with first limiting springs, and two ends of each first limiting spring respectively push against corresponding ports of the sleeve and the pull cylinder and are constantly in a compressed state.
4. The recyclable heat-insulating mulching film as claimed in claim 2, wherein the pulling and pressing mechanism comprises two grooves arranged on the supporting plate, a pressing block is arranged in the grooves in a sliding manner, a second limiting spring in a compressed state is arranged at the top of the pressing block, a pulling hook exposed to the outside of the grooves is arranged on the surface of the pressing block, and the pulling hook is bent downwards and is used for matching with the sleeve.
5. The recyclable insulation mulch film as claimed in claim 1, wherein the two hard film strips are provided with an assembly rib on one side and an assembly groove on the other side for engaging with the assembly rib of the side mulch film unit.
6. The recyclable heat-insulating mulching film as claimed in claim 1, wherein the support guard plates are provided with an assembly clamping strip and an assembly clamping groove on both sides, and the top parts of the corresponding support guard plates of the two support mechanisms are inclined oppositely and the bottom parts thereof are away from each other.
7. The recyclable heat-insulating mulching film as claimed in claim 1, wherein the bottom of the support guard plate is fixedly provided with a soil-binding rod, the soil-binding rod is arranged vertically to the horizontal plane, and a plurality of soil-binding nails are arranged on the soil-binding rod in the circumferential direction.
8. The recyclable heat-insulating mulching film as claimed in claim 7, wherein the soil-binding nails are bent upwards.
9. The recyclable insulation mulch of claim 1, wherein the hard membrane strips are made of transparent plastic with a thickness of 1mm and the support plates are made of black PVC material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022684787.1U CN213719070U (en) | 2020-11-18 | 2020-11-18 | Recyclable heat-preservation mulching film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022684787.1U CN213719070U (en) | 2020-11-18 | 2020-11-18 | Recyclable heat-preservation mulching film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213719070U true CN213719070U (en) | 2021-07-20 |
Family
ID=76826811
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022684787.1U Expired - Fee Related CN213719070U (en) | 2020-11-18 | 2020-11-18 | Recyclable heat-preservation mulching film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213719070U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112166917A (en) * | 2020-11-18 | 2021-01-05 | 河南省烟草公司平顶山市公司 | Mulching film device convenient for ventilation and heat dissipation of tobacco plant roots |
| CN114431117A (en) * | 2022-03-07 | 2022-05-06 | 吉林省农业科学院 | Under-mulch drip irrigation fertilization method and device for millet planting |
-
2020
- 2020-11-18 CN CN202022684787.1U patent/CN213719070U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112166917A (en) * | 2020-11-18 | 2021-01-05 | 河南省烟草公司平顶山市公司 | Mulching film device convenient for ventilation and heat dissipation of tobacco plant roots |
| CN114431117A (en) * | 2022-03-07 | 2022-05-06 | 吉林省农业科学院 | Under-mulch drip irrigation fertilization method and device for millet planting |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20210720 |