CN109169612A - Equipment for spraying to tea tree - Google Patents
Equipment for spraying to tea tree Download PDFInfo
- Publication number
- CN109169612A CN109169612A CN201811312196.2A CN201811312196A CN109169612A CN 109169612 A CN109169612 A CN 109169612A CN 201811312196 A CN201811312196 A CN 201811312196A CN 109169612 A CN109169612 A CN 109169612A
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- China
- Prior art keywords
- equipment
- tea tree
- spraying
- matched
- driving
- 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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Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M7/00—Special adaptations or arrangements of liquid-spraying apparatus for purposes covered by this subclass
- A01M7/0025—Mechanical sprayers
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Insects & Arthropods (AREA)
- Pest Control & Pesticides (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Catching Or Destruction (AREA)
Abstract
The invention discloses a kind of equipment for spraying to tea tree, including rack；For driving the telecontrol equipment of whole equipment fore-aft motion；For driving the driving device of the telecontrol equipment rotation；For storing the explosive box of medical fluid, which is detachably connected with the rack；It is matched with the driving device to spray the flusher of medical fluid to the tea tree for being located at rack two sides.The drive mechanism on the power to the flusher in the driving device is transmitted, which is included in the power transmission that driving device can be cut off under manual thrust.The present invention passes through setting drive mechanism, power in driving device is transmitted on flusher by its realization, whole equipment only needs a power source during being somebody's turn to do, reduce the energy consumption and cost of whole equipment, and the setting of the drive mechanism, synchronous spray is realized when telecontrol equipment movement, is realized to walk and be sprayed, when telecontrol equipment stop motion, and it can quickly stop power transmission.
Description
Technical field
The invention belongs to Tea planting technical fields, more particularly, to a kind of equipment for spraying to tea tree.
Background technique
Tealeaves refers to leaf and the tender shoots of tea tree, refers to the leaf for the evergreen shrubs tea tree that can be used for making tea, wherein with
Green tea represents the most, during planting to green tea, needs to carry out medical treatment to tea tree, have on tea tree to reduce
Insect gnaws tender leaf, destroys the quality of tender leaf, influences the effect that tealeaves comes out in plantation；What is sprayed insecticide to more tealeaves
When, it to spray in due course, in different seasons, different pesticides is sprayed for different insect pests.
The equipment of tea place spray currently on the market, when movement, the individual power source that motion-promotion force source is, and
The power source of spray is usually that water pump etc. is realized, although the setting is simple, two power are arranged on one device
Source, it is clear that the cost of whole equipment can improve, and the structure of power source is in contrast complex, will lead to whole equipment
The case where being easy to appear damage, service life are short.
Summary of the invention
The present invention for overcome the deficiencies in the prior art, provides that a kind of structure is simple, power output is stable, long service life
The equipment for spraying to tea tree.
To achieve the goals above, the invention adopts the following technical scheme: a kind of equipment for spraying to tea tree, including
Rack；
For driving the telecontrol equipment of whole equipment fore-aft motion；
For driving the driving device of the telecontrol equipment rotation；
For storing the explosive box of medical fluid, which is detachably connected with the rack；
It is matched with the driving device to spray the flusher of medical fluid to the tea tree for being located at rack two sides；
The drive mechanism on the power to the flusher in the driving device is transmitted, which is included in pushes away manually
The power transmission of driving device can be cut off under power.
Power in driving device is transmitted on flusher by the present invention by setting drive mechanism, realization, the mistake
Whole equipment only needs a power source in journey, reduces the energy consumption and cost of whole equipment, and the setting of the drive mechanism,
It realizes synchronous spray when telecontrol equipment moves, and realizes to walk and spray, when telecontrol equipment stop motion, and energy
Quickly stop power transmission, structure is simple, effective to extend whole equipment service life；And the drive mechanism can also be real
Show when power transmission, when not needing spray, power transmission can have been cut off, therefore do not need either in non-tea place
When spray, operation that whole equipment can also be stable；It, should when being sprayed insecticide by the way that telecontrol equipment is arranged
Telecontrol equipment climbing ability is strong, can effectively move on designated position from the foot of the hill；To which whole equipment is suitable for whole ground
Shape, it is practical；And telecontrol equipment is one, therefore during use, telecontrol equipment the space occupied is small, therefore closes
The spacing in Gansu Province, can improve whole equipment stability on suitable tradition tea place；It, should and because being moved using telecontrol equipment
Will not skid in motion process in the process, thus both can stable movement upwards, can also be stable move downward spilling medicine
When, save manpower.
Preferably, the flusher includes piston cylinder, the piston piece matched with the piston cylinder and the piston
The cylinder liquid suction pipe being connected and the spray component matched with the piston cylinder, the liquid suction pipe detachably connect with the explosive box
It connects；The process that effectively crawler belt can be driven to work in entire driving device by setting piston cylinder, piston piece, liquid suction pipe
In, by the power of driving device, driving device is realized when side is run, while spray insecticide to tea place, the mistake
Pesticide spraying is uniform in journey, and the pesticide for avoiding local tea tree excessively causes have pesticide residue on tealeaves, and hydrojet is arranged
Component then can effectively spray pesticide, and the effect of sprinkling is good.
Preferably, the drive mechanism includes rotating gear and the deceleration group for driving the rotary teeth wheel rotation
Part, the reduction assemblies are matched with the driving device, which passes through a line shaft for power transmission to the rotation
In rotating disk；Setting rotation gear can push the piston piece to travel forward, and can make to revolve by wind spring on rotation gear
Rotating disk rotates backward, so that piston piece again can be stable withdraws.
Preferably, the line shaft includes the first axle body matched with the reduction assemblies and the rotation gear
The second axle body that matches and socket bearing for rotation stop connection the first axle body and the second axle body, the first axle body and described
The second axle body is flexibly connected；Be flexibly connected between the first axle body and the second axle body, when cutting off power output, first
Axis body can normal rotation, the second axle body will not be had an impact.
Preferably, being connected with the catch bar for pushing the socket bearing left and right moving to make on the socket bearing；It pushes away
Lever can be convenient for hand directly manipulate, and socked shaft honours the first axle body and the power of the second axle body is attached.
In conclusion the present invention by setting drive mechanism, realizes the power in driving device being transmitted to sprinkling dress
It sets, whole equipment only needs a power source during being somebody's turn to do, and reduces the energy consumption and cost of whole equipment, and the transmission knot
The setting of structure, the synchronous spray of realization, realizes to walk and spray when telecontrol equipment movement, telecontrol equipment stop motion
When, and can quickly stop power transmission.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention one.
Fig. 2 is structural schematic diagram two of the invention.
Fig. 3 is the enlarged drawing of A in Fig. 2.
Fig. 4 is partial structural diagram one of the invention.
Fig. 5 is partial structural diagram two of the invention.
Fig. 6 is partial structural diagram three of the invention.
Fig. 7 is the enlarged drawing of B in Fig. 6.
Fig. 8 is partial exploded view of the invention.
Specific embodiment
In order to make those skilled in the art better understand the present invention program, below in conjunction in the embodiment of the present invention
Attached drawing, the technical scheme in the embodiment of the invention is clearly and completely described.
As shown in figures 1-8, a kind of equipment for spraying to tea tree, including rack 1, a telecontrol equipment 2, driving device
3, soil-finishing device 4, explosive box 5 and flusher 6, wherein the rack 1 is a metal frame；Specifically, the telecontrol equipment 2
Including crawler belt 21, driving wheel 22 and damping part 23, the crawler belt 21 is a metal track, is had on the inner wall of the crawler belt 21
First anti-slop serrations 211, first anti-slop serrations 211 are metal-toothed；The second anti-slop serrations are equipped on the outer wall of above-mentioned crawler belt 21
212, the metal-toothed of 212 strip of the second anti-slop serrations；And the left and right sidewall of second anti-slop serrations 212 is inclined inclined-plane；
The driving wheel 22 is the metal wheel that surface has the groove matched with the first anti-slop serrations 211, which is by upper
What the driving device 3 stated was rotated under driving.
Specifically, the damping part 23 includes the first expanding wheel 231, the second expanding wheel 232 and damping spring 233, institute
Stating the first, second expanding wheel is with the metal wheel for matching groove with first anti-slop serrations 211；First expanding wheel
231 are connected with a first connecting rod 235 by bearing, and second expanding wheel 232 is connected with second by bearing
Connecting rod 236, described 233 one end of damping spring are connected with the first connecting rod 235, the other end and second connecting rod
236 are connected, and first, second expanding wheel is located at same level, and the first, second expanding wheel is located at the driving wheel 22
Lower section；First expanding wheel 231 is connected with third connecting rod 237, which connect with described first
Bar 235 is connected, and second expanding wheel 232 is connected with the 4th connecting rod 238, and the 4th connecting rod 238 connects with described second
Extension bar 236 is connected；One the 5th connecting rod 239 is connected on the driving wheel 22, the 5th connecting rod 239 is inverted
V-arrangement setting；The third connecting rod 237 is connected by one first spring 291 with described 5th connecting rod, 239 one end, and described the
Four connecting rods 238 are connected by second spring 292 with the other end of the 5th connecting rod 239；Therefore the driving wheel 22, the
One expanding wheel 231 and the second expanding wheel 232 form triangular shape, so that the crawler belt 21 also forms triangular shape.
Specifically, the rack 1 is equipped with scraping member 24, the scraping member 24 includes scraper plate 241, elastic component 242
And driving wheel 243 is scraped, the scraper plate 241 is a metal plate, the side of the scraper plate 241 and 1 hinge of rack, the elastic component
242 be a metal spring, and described 242 one end of elastic component is connected with the scraper plate 241, and the other end is connected with the rack 1, the bullet
Property part 242 pull the scraper plate 241 to tilt；When the crawler belt 21 movement, the scraper plate 241 can enter two second
Between anti-slop serrations 212, the soil between two second anti-slop serrations 212 is wiped off；The driving wheel 243 of scraping is a metal tube, this is scraped
Driving wheel 243 is located at the end of the scraper plate 241, and the driving wheel 243 of scraping can be rolled in the end of the scraper plate 241, described
It scrapes driving wheel 243 and scrapes movable tooth 244 equipped with multiple, the movable tooth 244 of scraping is to be bonded in the conical tooth scraped on driving wheel end face, institute
It states and scrapes movable tooth 244 and be made of wear-resistant plastic.
Further, the driving device 3 includes actuator 31, output shaft 32, driving wheel 33 and drive rod 34, the drive
Moving part 31 is the gasoline engine in the rack 1；The output shaft 32 is a metal shaft, the output shaft 32 and the actuator
31 are connected, therefore when the actuator is opened, the output shaft 32 can be driven to rotate；The driving wheel 33 is a metal
Gear, the driving wheel 33 are connect with 32 rotation stop of output shaft；The rotating bar 34 is a metallic rod, one end of the rotating bar 34
Be connected with the driving wheel 22, the other end is connected with a driven wheel 35, the middle part of the rotating bar 34 by a bearing with it is described
Rack 1 is connected, and the driving wheel 33 is meshed with the driven wheel 35, therefore when the actuator 31 is opened, described
Actuator 31 can drive the driving wheel 22 to rotate.
Further, the soil-finishing device 4 includes soil-suppressing board 41, strike-off stick 42, rolling member 43 and pusher cylinder 45；It is described
Soil-suppressing board 41 is a metal plate, and one end of the soil-suppressing board 41 has two metal protruding shafts 411, and the rack 1 is equipped with two sliding slots 11,
Institute's protruding shaft 411 is inserted into the sliding slot 11, and the protruding shaft 411 can slide up and down in the sliding slot 11, also can be rotated；Institute
Stating pusher cylinder 45 is a conventional cylinder, and the pusher cylinder 45 inclination is located in the rack 1, the end of the pusher cylinder 45
Portion's connection has a bolster 451, and the bolster 451 is a spring；The end of the bolster 451 is connected with metallic rod, institute
It states metallic rod to be flexibly connected with the soil-suppressing board 41, therefore the pusher cylinder 45, when opening, which can
Push 41 activity of soil-suppressing board；The strike-off stick 42 is a C-shaped plate, the strike-off stick 42 and the 41 lower end surface phase of soil-suppressing board
Even；Two through hole is equipped on the soil-suppressing board 41,43 part of rolling member passes through in the through-hole, the rolling member 43
For metallic roll；Cleaning member 46 is additionally provided on the soil-suppressing board 41, the cleaning member 46 is that section is L-shaped wear-resistant plastic, should
Cleaning member 46 is in contact with the end face of the rolling member 43, and 46 end of cleaning member has arcwall face；In the rolling member 43
In the rotation, the soil on the rolling member 43 can be fallen on ground under the striking off of the cleaning member 46.
Specifically, the flusher 6 includes piston cylinder 61, piston piece 62, liquid suction pipe 63 and hydrojet component 64, the work
Plug tube 61 is a metal cylinder, and the piston cylinder 61 is set in the rack 1, and the piston piece 62 is by screw rod 621 and piston
First 622 are constituted, and the screw rod 621 is a metallic rod, and the piston head 622 is a Rubber end, the screw rod 621 and the piston
First 622 are connected, which penetrates into the piston cylinder 61；And the piston piece 62 by a connection structure with it is described
Output shaft 32 is connected, and the liquid suction pipe 63 is metallic conduit, which is connected with the piston cylinder 61 and the liquid suction pipe
Check valve is equipped in 63；The explosive box 5 is connect with the liquid suction pipe 63, and the explosive box 5 is a plastic box；The spray
Liquid component 64 includes general pipeline 640, the first branch pipe 641 and the second branch pipe 642, and the general pipeline 640 is connected with the piston cylinder 61,
And check valve is equipped in the general pipeline；Wherein first branch pipe 641 is connected with the general pipeline, and the second branch pipe is similarly and institute
General pipeline 640 is stated to be connected；First branch pipe 641 includes the first tube body and the second tube body, and first tube body is and described the
The plastic conduit that general pipeline is connected, second tube body is the plastic conduit being spirally connected with first tube body, in second tube body
It is upper that there are multiple spray heads；Likewise, second tube body includes third tube body and the 4th tube body, the third tube body and described the
What four tube bodies were connected, there are multiple spray heads on the 4th tube body, while described first, third tube body is on the general pipeline
Height can be adjusted.
Further, the drive mechanism 7 includes that reduction assemblies are connected with rotation gear 72, and the reduction assemblies 71 are too
Positive planetary gear set, the reduction assemblies are connected with the output shaft, and the end of the reduction assemblies is connected with tooth
The line shaft of wheel, the rotation gear 72 are a metal gear, the gear phase of the rotation gear 72 and axis on the reduction assemblies
Engagement has a through-hole in the middle part of the rotation gear 72, has internal screw thread, the rotation in the through-hole at 72 middle part of rotation gear
Internal screw thread on gear 72 is meshed with the screw rod 621, therefore when the rotation gear 72 rotation, drives the work
62 forward motion of plug member, realizes the hydrojet of progress；A reset spring 79, the reset bullet are connected on the rotation gear 72
Spring 79 is a wind spring, which is connected with the rotation gear, and the other end is connected with rack；And the power
Axis 73 includes the first axle body 731 being connected with the reduction assemblies, the second axle body 732 of connection gear and covers in second axis
Socket bearing 733 on body 732, the first axle body 731 are flexibly connected with the second axle body 732, the first axle body 731
Upper to have multiple first rotation stop grooves 741, the inner ring of the socket bearing 733 is equipped with tool, and there are six planes；In the first axle
Body 731 is equipped with the first hexagonal rotation prevention portion 701, and the end of second week axis body 732 is equipped with the second rotation prevention portion 702, described
Bearing 733 is socketed when moving left and right, the socket bearing connects first rotation prevention portion 701 and the second rotation prevention portion 702；It is described
It is socketed on the outer ring of bearing 733 and is connected with a catch bar 75, the catch bar 75 extends face, thus by pushing away described in pushing
Lever 75 realizes socket bearing connection the first axle body 731 and the second axle body 732；When being sprayed, the mobile promotion
Bar 75 realizes that the first axle body is connected with the second axle body, and during use, can spray it in the medicine in piston cylinder
Afterwards, it disconnects the first axle body to connect with the second axle body, so that wind spring drives the piston piece to exit out of piston cylinder；Medicine is taken out in realization
Enter into piston cylinder.
Obviously, described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment should fall within the scope of the present invention.
Claims (9)
1. a kind of equipment for spraying to tea tree, it is characterised in that: including
Rack (1)；
For driving the telecontrol equipment (2) of whole equipment fore-aft motion；
For driving the driving device (3) of the telecontrol equipment rotation；
For storing the explosive box (5) of medical fluid, which is detachably connected with the rack (1)；
It is matched with the driving device (3) to spray the flusher (6) of medical fluid to the tea tree for being located at rack two sides；
The drive mechanism (7) on the power to the flusher (6) on the driving device (3) is transmitted, the drive mechanism (7)
It is included in the power transmission that driving device (3) can be cut off under manual thrust.
2. a kind of equipment for spraying to tea tree according to claim 1, it is characterised in that: the flusher (6)
The piston piece (62) matched including piston cylinder (61), with the piston cylinder (61), the pumping being connected with the piston cylinder (61)
Liquid pipe (63) and the spray component (64) matched with the piston cylinder (61), the liquid suction pipe (63) and the explosive box (5)
It is detachably connected.
3. a kind of equipment for spraying to tea tree according to claim 2, it is characterised in that: the drive mechanism (7)
Reduction assemblies including rotation gear (72) and for driving rotation gear (72) to rotate, the reduction assemblies and the drive
Dynamic device (3) match, which will be in power transmission to the rotation gear (72) by a line shaft (73).
4. a kind of equipment for spraying to tea tree according to claim 3, it is characterised in that: line shaft (72) packet
The second axle body (732) for including the first axle body (731) matched with the reduction assemblies, being matched with rotation gear (42)
And for rotation stop connection the first axle body (731) and the second axle body (732) socket bearing (733), the first axle body (731) and
The second axle body (732) is flexibly connected.
5. a kind of equipment for spraying to tea tree according to claim 4, it is characterised in that: the socket bearing
(733) catch bar (75) for pushing socket bearing (733) left and right movement is connected on.
6. a kind of equipment for spraying to tea tree according to claim 1, it is characterised in that: the telecontrol equipment (2)
Including crawler belt (21), the driving wheel (22) for driving the crawler belt (21) to rotate and the damping matched with the crawler belt (21)
Component (23), the driving wheel (22) match with the driving device (3), the damping part (23) and the driving wheel
(22) it matches supportting the crawler belt (21) for triangle.
7. a kind of equipment for spraying to tea tree according to claim 3, it is characterised in that: the damping part (23)
Including the first expanding wheel (231) matched with the crawler belt (21), the second expanding wheel matched with the crawler belt (21)
(232) and with the damping spring (233) of first, second expanding wheel matched.
8. a kind of equipment for spraying to tea tree according to claim 4, it is characterised in that: crawler belt (21) side
Equipped with the first anti-slop serrations (211) matched with the driving wheel, which is equipped with the second anti-slop serrations (212),
The rack (1) is equipped with the scraping member (24) for striking off the soil between adjacent two second anti-slop serrations (212).
9. a kind of equipment for spraying to tea tree according to claim 1, it is characterised in that: the scraping member (24)
Including the scraper plate (241) being flexibly connected with the rack (1), the elastic component (242) being connected with the scraper plate (241) and it is set to institute
State scraping driving wheel (243) for scraper plate (241) end, it is described scrape driving wheel (243) and be equipped with multiple scrape movable tooth (234).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811312196.2A CN109169612A (en) | 2018-11-06 | 2018-11-06 | Equipment for spraying to tea tree |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811312196.2A CN109169612A (en) | 2018-11-06 | 2018-11-06 | Equipment for spraying to tea tree |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109169612A true CN109169612A (en) | 2019-01-11 |
Family
ID=64942031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811312196.2A Pending CN109169612A (en) | 2018-11-06 | 2018-11-06 | Equipment for spraying to tea tree |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109169612A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113661972A (en) * | 2020-05-14 | 2021-11-19 | 四川农之星科技有限公司 | Intelligent crawler-type multifunctional tea garden management plant protection machine |
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|---|---|---|---|---|
| JP2000060268A (en) * | 1998-08-19 | 2000-02-29 | Ochiai Hamono Kogyo Kk | Simple sulky-type tea-leaf picking machine |
| CN203058157U (en) * | 2013-01-22 | 2013-07-17 | 西北农林科技大学 | Crawler self-propelled wind power spray machine for kiwi fruit garden |
| CN105460094A (en) * | 2015-12-18 | 2016-04-06 | 重庆鑫源农机股份有限公司 | Mini-tiller caterpillar band assembly with functions of soil removing and vibration damping |
| CN205559603U (en) * | 2016-04-26 | 2016-09-07 | 马鞍山市力鑫机械制造有限公司 | Breaker separation and reunion formula shaft coupling |
| CN107094741A (en) * | 2017-06-27 | 2017-08-29 | 上海电机学院 | A kind of farmland highly effective pesticide spraying machine |
| CN207284921U (en) * | 2017-10-25 | 2018-05-01 | 郑青飞 | A kind of pesticide mixes sprinkling cart automatically |
| CN108031398A (en) * | 2017-11-29 | 2018-05-15 | 周兰芝 | A kind of agricultural uses pesticide preparation device |
-
2018
- 2018-11-06 CN CN201811312196.2A patent/CN109169612A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000060268A (en) * | 1998-08-19 | 2000-02-29 | Ochiai Hamono Kogyo Kk | Simple sulky-type tea-leaf picking machine |
| CN203058157U (en) * | 2013-01-22 | 2013-07-17 | 西北农林科技大学 | Crawler self-propelled wind power spray machine for kiwi fruit garden |
| CN105460094A (en) * | 2015-12-18 | 2016-04-06 | 重庆鑫源农机股份有限公司 | Mini-tiller caterpillar band assembly with functions of soil removing and vibration damping |
| CN205559603U (en) * | 2016-04-26 | 2016-09-07 | 马鞍山市力鑫机械制造有限公司 | Breaker separation and reunion formula shaft coupling |
| CN107094741A (en) * | 2017-06-27 | 2017-08-29 | 上海电机学院 | A kind of farmland highly effective pesticide spraying machine |
| CN207284921U (en) * | 2017-10-25 | 2018-05-01 | 郑青飞 | A kind of pesticide mixes sprinkling cart automatically |
| CN108031398A (en) * | 2017-11-29 | 2018-05-15 | 周兰芝 | A kind of agricultural uses pesticide preparation device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113661972A (en) * | 2020-05-14 | 2021-11-19 | 四川农之星科技有限公司 | Intelligent crawler-type multifunctional tea garden management plant protection machine |
| CN113661972B (en) * | 2020-05-14 | 2023-01-06 | 四川农之星科技有限公司 | Intelligent crawler-type multifunctional tea garden management plant protection machine |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190111 |