CN112586109A - Cutter of deep ploughing and smashing loosener - Google Patents
Cutter of deep ploughing and smashing loosener Download PDFInfo
- Publication number
- CN112586109A CN112586109A CN202011597417.2A CN202011597417A CN112586109A CN 112586109 A CN112586109 A CN 112586109A CN 202011597417 A CN202011597417 A CN 202011597417A CN 112586109 A CN112586109 A CN 112586109A
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- blade
- spiral
- cutter
- fixing part
- deep ploughing
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B33/00—Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs
- A01B33/08—Tools; Details, e.g. adaptations of transmissions or gearings
- A01B33/10—Structural or functional features of the tools ; Theoretical aspects of the cutting action
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B33/00—Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs
- A01B33/08—Tools; Details, e.g. adaptations of transmissions or gearings
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Soil Working Implements (AREA)
Abstract
The invention provides a cutter of a deep ploughing and smashing ripper, which comprises a cutter bar, a spiral blade and ripping blades, wherein the spiral blade extends downwards to the bottom of the cutter bar from top to bottom around the cutter bar in a spiral way; the soil loosening blade comprises a blade fixing part and a blade, and the blade extends outwards from the blade fixing part to the upper part in an arc shape; the arc angle of the blade in the upper end region of the spiral piece is larger than that of the blade in the lower end region of the spiral piece, the cutter bar is made of 0Cr13Ni5Mo, the cutter bar is made of a material with high strength and high toughness, the strength of the cutter bar can be guaranteed during working, the cutter bar is not easy to break during deep ploughing of the cutter, and the cutter bar can be timely reset after stress relief when elastic deformation occurs.
Description
Technical Field
The invention relates to the technical field of deep ploughing cutters, in particular to a cutter of a deep ploughing crushing loosener.
Background
The deep ploughing equipment has the main effects of deep ploughing and deep scarification of the land, in the past, the deep ploughing and deep scarification machine takes a tractor as a platform, adopts old traditions such as ploughing, beating and harrowing, has complex procedures and low efficiency, can work only when the ploughed land is wet and soft, has short ploughing time and shallow ploughing depth and is not beneficial to agricultural production. Therefore, the traditional method cannot be adapted to the large-area land requiring deep ploughing and deep scarification, and therefore, the automatic deep ploughing and deep scarification is generated.
The Chinese utility model application with the application number of 201020514808.9 discloses a rotary grinding type deep ploughing powder ridge multifunctional machine, and specifically discloses a rotary grinding type deep ploughing powder ridge multifunctional machine which comprises an engine, a gearbox, a frame, a spiral drill and a travelling wheel, wherein the transmitter is arranged on the frame of a tractor, the output of the engine shaft is connected with the gearbox through a coupling, the lower part of the chassis of the tractor is provided with the travelling wheel or a crawler wheel, the gearbox drives the travelling wheel through a chain, a belt or the coupling, a hydraulic mechanism and a linkage rotary grinding drill bit device or a cultivating component are arranged on the rear frame of the tractor, the rotary grinding drill bit device is provided with one or more drill bit shafts, spiral blades are arranged on the drill bit shafts, angle teeth are arranged on the spiral blades, the hydraulic mechanism drives the rotary grinding drill bit to move up and down, the gearbox drives the rotary grinding drill bit and the linkage rotary grinding drill bit device through a connecting rod, however, the spiral blade of the rotary grinding type deep ploughing and pulverizing multifunctional machine lacks an auxiliary mechanism for digging, has large resistance to digging, and further, when the drill rod moves forward along with the deep ploughing machine while rotating during ploughing operation, the lower surface of the spiral blade is easy to be worn when the spiral blade cuts and rubs soil, and the rotary grinding type deep ploughing and pulverizing multifunctional machine has short service life and low practicability. For this reason, the above-described problems are urgently needed to be solved.
To solve the above problems, a helical drill of a subsoiler facilitating penetration into the ground has now appeared. A helical drill of a subsoiler facilitating soil penetration is disclosed in chinese patent application No. 201510064658.3, publication No. 2017.01.04. The drilling machine comprises a drill rod and a helical blade, wherein the helical blade is wound on the lower portion of the drill rod, and the drilling machine further comprises an earth-entering blade which is arranged at the tail portion of the helical blade and is positioned on the lower surface of the helical blade. The rotary drill rod has a simple structure, the drill rod rotates and moves forwards along with the deep scarification cultivator during the tillage operation, and the lower surface of the tail part of the helical blade is provided with the soil-entering blade, so that the drill rod can rotate and enter the soil at the same time, the abrasion of the helical blade can be effectively reduced, the service life of the helical blade is prolonged, and the rotary drill rod is high in practicability.
However, when the drilling tool is used for fast rotating operation, the helical blades and the blades mounted on the helical blades can provide centrifugal forces in different directions to the drill rod at different heights of the drill rod, the centrifugal forces cannot be offset, so that the whole drill rod continuously vibrates and is conducted to the whole tool, in the operation process, because the loads of soil in different depths are uneven, the vibration can be further aggravated, when a plurality of drilling tools are used for operation, the mutual disturbance of the drilling tools which are difficult to completely synchronize cannot be offset, the moments in different directions can be generated at different positions of the powder ridge box, the vibration can be aggravated, the synthesized vibration is very complex, the vibration is difficult to relieve or even study when the drilling tool with a single helical blade is adopted, and the stability and the service life of the whole drilling tool and parts can be influenced. The transmission of sustained vibration to the cabin also makes the driver more fatigued to the process.
In addition, when the existing cutter bar is subjected to bending force and twisting force, the cutter bar is easy to break or not reset after deformation, and the cutter bar cannot be normally used after the condition occurs.
Disclosure of Invention
The cutter bar is made of a material with high strength and high toughness, and the strength of the cutter bar can be ensured during working, so that the cutter bar is not easy to break during deep ploughing of the cutter, and the cutter bar can be timely reset after stress is relieved when elastic deformation occurs; in addition, the arc angle through the blade sets up, slows down the range of cutter vibrations on the one hand, and on the other hand is effectual to the crushing of soil.
A deep ploughing and smashing loosener cutter comprises a cutter bar, a spiral blade and loosening blades, wherein the spiral blade extends downwards to the bottom of the cutter bar from top to bottom around the cutter bar in a spiral mode, the spiral blade is provided with an upper end region and a lower end region, more than two loosening blades are arranged in the upper end region of the spiral blade, and more than two loosening blades are arranged in the lower end region of the spiral blade; the soil loosening blade comprises a blade fixing part and a blade, the blade fixing part is arranged on the spiral blade, the blade is arranged at one end of the blade fixing part, and the blade extends upwards from the blade fixing part in an arc shape; the arc angle of the blade at the upper end area of the spiral blade is larger than that of the blade at the lower end area of the spiral blade, and the material of the cutter bar is 0Cr13Ni5 Mo.
According to the cutter with the structure, the cutter bar is made of 0Cr13Ni5Mo material with high strength and high toughness, the strength of the cutter bar can be ensured during working, the cutter bar is not easy to break during deep ploughing of the cutter, and the cutter bar can be timely reset after stress is relieved when elastic deformation occurs; in the process of cutter rotation, the loosening blade also rotates along with the cutter, soil near the cutter is crushed by the loosening blade, the loosening blade is arranged in an arc shape and gradually increases from the bottom end of the spiral blade to the top end of the spiral blade, when the cutter moves downwards, the blade can not directly push the soil when the blade is in contact with the soil under the action of the arc, the contact force of the soil and the blade is dispersed to the two ends of the blade when the blade is in contact with the soil, so that the stress of the cutter when the cutter moves is reduced, the load of the soil at different depths is uneven, the stress of the cutter in the deeper soil is larger, the arc angle of the blade at the bottom end of the spiral blade is small, the acting force of the soil at the lower end on the blade is changed by reducing the arc angle of the blade at the lower end, all the blades are more uniformly stressed, the vibration of the cutter during working is reduced, in addition, the arc angle of, the action surface of the soil discharged upwards is enlarged, so that the soil can be crushed more thoroughly, and the crushing effect is improved; only two kinds of arc-shaped angle blades are arranged in the cutter, the number of types to be produced is small, the production cost can be reduced, and meanwhile, the installation effect is relatively low.
Further, be equipped with the blade of burying on the end of flight, the blade of burying extends the setting from the terminal downward sloping of flight, through setting up the blade of burying, when the cutter will bore the depths of ploughing, can be better carry out the excavation of soil and carry out the supplementary of burying.
Further, the insert has a front portion provided with a chip cutting edge, a rear portion and an end portion; the front part extends from the middle part of the blade to the front part and downwards obliquely to form the cutting edge, and the end part extends from the bottom surface of the end part to the top surface and outwards to form an end cutting edge which is higher than the cutting edge; the end part extends from the front part to the rear part and slantways towards the blade fixing part;
above setting, owing to set up cutting edge and tip cutting edge, with the deep ploughing crushing loosener blade install the back on the spiral piece of cutter, the cutter is rotatory, then the cutting edge carries out the smear metal to anterior soil and loosens the soil, tip cutting edge carries out the smear metal to the soil of cutter side and loosens the soil, because cutting edge and tip cutting edge misplace from top to bottom, therefore, in the vertical direction, the effort of soil to cutting edge and tip cutting edge also can misplace, thereby let the smear metal power dispersion not concentrate, in addition, because the blade is the arc, so the cutting edge also is the arc, and thus, in the vertical direction, the effort to cutting edge also can not be on same horizontal plane, also carried out the dispersion to the smear metal power, consequently, reduced and smashed the loosener blade intensity requirement to deep ploughing, the life of deep ploughing crushing loosener blade has been improved. Since the end portion extends obliquely from the front portion to the rear portion toward the insert fixing portion and the end portion is formed with an end chip cutting edge, the resistance of the insert to the front soil is reduced at the end portion of the insert as the insert rotates with the tool.
Further, the cutting edge protrudes from the front of the insert-holding portion. This allows the blade to cut into the soil more easily.
Further, the width of the insert gradually increases from the end of the insert fixing portion to the end away from the insert fixing portion. The blade plays a certain role of the spiral piece, and the effect of upward soil discharging is improved.
Further, the blade fixing portion is provided with a mounting hole. Therefore, the blades of the deep ploughing and smashing scarifier can be fixed conveniently.
Furthermore, the front part of the chip cutting edge and the front part of the blade fixing part are in arc transition. This structure, when then the cutting edge smear metal soil, can lead to the flow direction of soil, lets the partial soil of blade flow towards blade fixed part direction promptly, leads partial soil to the spiral piece of installation deep ploughing crushing loosener blade, improves the efficiency of the row of soil that makes progress to improve the effect of loosening the soil.
Furthermore, the blade fixing part is positioned below the spiral piece, more than two connecting bolts arranged along the length direction of the soil loosening blade are connected between the blade fixing part and the spiral piece, a blade limiting part is arranged on one side of the spiral piece positioned on the blade fixing part and resists the blade fixing part, and the blade limiting part is arranged close to the connecting bolts on the outer side;
more than setting up, when the cutter is rotatory, thereby blade smear metal soil produces smear metal power to the blade, smear metal power is transmitted the blade fixed part, the blade fixed part transmits power to connecting bolt and the spacing portion of blade, through the keeping off of the spacing portion of blade, the shearing force of blade fixed part to connecting bolt has been reduced greatly, thereby effectual reduction connecting bolt fracture and cause the cutter inefficacy, the life of cutter has been improved, in addition, only set up the spacing portion of blade that is used for keeping off the blade fixed part at blade fixed part back, lower extreme to upper end spiral winding from the guide arm based on the flight, therefore, the flight of upper end is higher than the flight of lower extreme, thus, the bottom of the spacing portion of blade can be higher than or the parallel and level in the front portion of blade fixed part, can not bring bigger resistance to cutter smear metal soil.
Drawings
Fig. 1 is a front view of a deep ploughing and crushing ripper blade of the present invention.
Fig. 2 is a perspective view of the ripping blade of the present invention.
Fig. 3 is a perspective view of another perspective view of the ripping blade of the present invention.
Fig. 4 is an enlarged view at C in fig. 1.
Fig. 5 is a perspective view of the ripping blade of the present invention mounted on a flight.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 5, a deep ploughing and crushing loosener blade includes a blade bar 1y, a screw blade 2y and a loosening blade 3 y.
The spiral blade 2y is spirally wound around the cutter bar 1y from top to bottom and extends to the bottom of the cutter bar 1y, the spiral blade 2y is provided with an upper end region 201y and a lower end region 202y (the upper end region 201y is a region above a dotted line in fig. 1, and the lower end region 202y is a region below the dotted line in fig. 1), more than two loosening blades 3y are arranged in the upper end region 201y of the spiral blade 2y, and more than two loosening blades 3y are arranged in the lower end region 202y of the spiral blade 2 y; the soil loosening blade 3y comprises a blade fixing part 31y and a blade 32y, the blade fixing part 31y is installed on the spiral blade 2y, the blade 32y is arranged at one end of the blade fixing part 31y, and the blade 32y extends outwards and upwards in an arc shape from the blade fixing part 31 y; the arc angle a of the blade 32y at the upper end region 201y of the flight 2y is greater than the arc angle B of the blade 32y at the lower end region 202y of the flight 2y, and the material of the tool bar is 0Cr13Ni5 Mo.
As shown in fig. 4, the tip of the flight 2y is provided with an earth-penetrating blade 21y, and the earth-penetrating blade 21y is provided so as to extend obliquely downward from the tip of the flight 2y, so that when the cutter is to be driven into the deep part of the cultivated land, soil excavation can be performed more favorably to assist the penetration.
As shown in fig. 2 and 3, the insert 32y has a front portion 321y, a rear portion 322y, and an end portion 323y, the front portion 321y being provided with a chip cutting edge 3211 y; the front portion 321y extends obliquely downward from the middle of the insert 32y to the front portion 321y to form the cutting edge 3211y, and the end portion 323y extends from the bottom surface to the top surface of the end portion 323y to form an end cutting edge 3231y, and the end cutting edge 3231y is higher than the cutting edge 3211 y; the end portion 323y extends obliquely from the front portion 321y to the rear portion toward the blade fixing portion 31 y; above setting, owing to set up cutting edge and tip cutting edge, with the deep ploughing crushing loosener blade install the back on the spiral piece of cutter, the cutter is rotatory, then the cutting edge carries out the smear metal to anterior soil and loosens the soil, tip cutting edge carries out the smear metal to the soil of cutter side and loosens the soil, because cutting edge and tip cutting edge misplace from top to bottom, therefore, in the vertical direction, the effort of soil to cutting edge and tip cutting edge also can misplace, thereby let the smear metal power dispersion not concentrate, in addition, because the blade is the arc, so the cutting edge also is the arc, and thus, in the vertical direction, the effort to cutting edge also can not be on same horizontal plane, also carried out the dispersion to the smear metal power, consequently, reduced and smashed the loosener blade intensity requirement to deep ploughing, the life of deep ploughing crushing loosener blade has been improved. Since the end portion extends obliquely from the front portion to the rear portion toward the insert fixing portion and the end portion is formed with an end chip cutting edge, the resistance of the insert to the front soil is reduced at the end portion of the insert as the insert rotates with the tool.
As shown in fig. 2, the chip cutting edge 3211y protrudes forward of the insert securing portion 31 y. This allows the blade to cut into the soil more easily.
As shown in fig. 3, the width of the insert 32y gradually increases from one end of the insert fixing portion 31y to one end distant from the insert fixing portion 31 y. The blade plays a certain role of the spiral piece, and the effect of upward soil discharging is improved.
As shown in fig. 2, the insert fixing portion 31y is provided with a mounting hole 310 y. Thus, the blades of the deep ploughing crushing loosener can be fixed conveniently
As shown in fig. 2, the chip cutting edge 3211y is in arc transition with the front portion of the insert securing portion 31 y. This structure, when then the cutting edge smear metal soil, can lead to the flow direction of soil, lets the partial soil of blade flow towards blade fixed part direction promptly, leads partial soil to the spiral piece of installation deep ploughing crushing loosener blade, improves the efficiency of the row of soil that makes progress to improve the effect of loosening the soil.
As shown in fig. 5, the blade fixing portion 31y is located below the screw blade 2y, two or more connecting bolts 33y are connected between the blade fixing portion 31y and the screw blade 2y and arranged along the length direction of the loosening blade 3y, a blade stopper portion 34y is provided on the screw blade 2y on the side of the blade fixing portion 31y, the blade stopper portion 34y abuts against the blade fixing portion 31y, and the blade stopper portion 34y is provided near the connecting bolt 33y on the outer side; more than setting up, when the cutter is rotatory, thereby blade smear metal soil produces smear metal power to the blade, smear metal power is transmitted the blade fixed part, the blade fixed part transmits power to connecting bolt and the spacing portion of blade, through the keeping off of the spacing portion of blade, the shearing force of blade fixed part to connecting bolt has been reduced greatly, thereby effectual reduction connecting bolt fracture and cause the cutter inefficacy, the life of cutter has been improved, in addition, only set up the spacing portion of blade that is used for keeping off the blade fixed part at blade fixed part back, lower extreme to upper end spiral winding from the guide arm based on the flight, therefore, the flight of upper end is higher than the flight of lower extreme, thus, the bottom of the spacing portion of blade can be higher than or the parallel and level in the front portion of blade fixed part, can not bring bigger resistance to cutter smear metal soil.
According to the cutter with the structure, the cutter bar is made of 0Cr13Ni5Mo material with high strength and high toughness, the strength of the cutter bar can be ensured during working, the cutter bar is not easy to break during deep ploughing of the cutter, and the cutter bar can be timely reset after stress is relieved when elastic deformation occurs; in the process of cutter rotation, the loosening blade also rotates along with the cutter, soil near the cutter is crushed by the loosening blade, the loosening blade is arranged in an arc shape and gradually increases from the bottom end of the spiral blade to the top end of the spiral blade, when the cutter moves downwards, the blade can not directly push the soil when the blade is in contact with the soil under the action of the arc, the contact force of the soil and the blade is dispersed to the two ends of the blade when the blade is in contact with the soil, so that the stress of the cutter when the cutter moves is reduced, the load of the soil at different depths is uneven, the stress of the cutter in the deeper soil is larger, the arc angle of the blade at the bottom end of the spiral blade is small, the acting force of the soil at the lower end on the blade is changed by reducing the arc angle of the blade at the lower end, all the blades are more uniformly stressed, the vibration of the cutter during working is reduced, in addition, the arc angle of, the action surface of the soil discharged upwards is enlarged, so that the soil can be crushed more thoroughly, and the crushing effect is improved; only two kinds of arc-shaped angle blades are arranged in the cutter, the number of types to be produced is small, the production cost can be reduced, and meanwhile, the installation effect is relatively low.
Claims (8)
1. The utility model provides a subsoiler crushing and loosening cutter which characterized in that: the soil loosening blade comprises a cutter bar, a spiral blade and soil loosening blades, wherein the spiral blade extends downwards to the bottom of the cutter bar from top to bottom around the cutter bar in a spiral way, the spiral blade is provided with an upper end region and a lower end region, more than two soil loosening blades are arranged in the upper end region of the spiral blade, and more than two soil loosening blades are arranged in the lower end region of the spiral blade; the soil loosening blade comprises a blade fixing part and a blade, the blade fixing part is arranged on the spiral blade, the blade is arranged at one end of the blade fixing part, and the blade extends upwards from the blade fixing part in an arc shape; the arc angle of the blade at the upper end area of the spiral blade is larger than that of the blade at the lower end area of the spiral blade, and the material of the cutter bar is 0Cr13Ni5 Mo.
2. The deep ploughing and crushing loosener knife of claim 1, wherein: the tail end of the spiral piece is provided with an earth-entering blade which is arranged in a downward inclined and extending mode from the tail end of the spiral piece.
3. The deep ploughing and crushing loosener knife of claim 1, wherein: the insert having a front portion, a rear portion and an end portion, the front portion being provided with a chip cutting edge; the front part extends from the middle part of the blade to the front part and downwards obliquely to form the cutting edge, and the end part extends from the bottom surface of the end part to the top surface and outwards to form an end cutting edge which is higher than the cutting edge; the end portion extends obliquely from the front portion to the rear portion toward the insert fixing portion.
4. The deep ploughing and crushing loosener knife of claim 3, wherein: the cutting edge protrudes from the front part of the blade fixing part.
5. The deep ploughing and crushing loosener knife of claim 3, wherein: the width of the insert gradually increases from the end of the insert securing portion to the end remote from the insert securing portion.
6. The deep ploughing and crushing loosener knife of claim 3, wherein: the blade fixing part is provided with a mounting hole.
7. The deep ploughing and crushing loosener knife of claim 3, wherein: the front part of the cutting edge and the blade fixing part is in arc transition.
8. The deep ploughing and crushing loosener knife of claim 1, wherein: the blade fixing part is located below the spiral piece, more than two connecting bolts arranged along the length direction of the soil loosening blade are connected between the blade fixing part and the spiral piece, a blade limiting part is arranged on one side, located on the blade fixing part, of the spiral piece, the blade limiting part resists against the blade fixing part, and the blade limiting part is arranged close to the connecting bolts on the outer side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011597417.2A CN112586109B (en) | 2020-12-29 | 2020-12-29 | Cutter of deep ploughing and smashing loosener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011597417.2A CN112586109B (en) | 2020-12-29 | 2020-12-29 | Cutter of deep ploughing and smashing loosener |
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| Publication Number | Publication Date |
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| CN112586109A true CN112586109A (en) | 2021-04-02 |
| CN112586109B CN112586109B (en) | 2023-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011597417.2A Active CN112586109B (en) | 2020-12-29 | 2020-12-29 | Cutter of deep ploughing and smashing loosener |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113118204A (en) * | 2021-04-23 | 2021-07-16 | 北京林大林业科技股份有限公司 | Device and method suitable for soil in-situ remediation |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101103664A (en) * | 2007-08-03 | 2008-01-16 | 胡婷 | General furrowing machine knife |
| CN102724863A (en) * | 2010-10-18 | 2012-10-10 | 柴坦亚·A·帕特尔 | An improved multi drill cultivator |
| CN105557091A (en) * | 2015-10-13 | 2016-05-11 | 广西五丰机械有限公司 | Subsoiling and tilling device |
-
2020
- 2020-12-29 CN CN202011597417.2A patent/CN112586109B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101103664A (en) * | 2007-08-03 | 2008-01-16 | 胡婷 | General furrowing machine knife |
| CN102724863A (en) * | 2010-10-18 | 2012-10-10 | 柴坦亚·A·帕特尔 | An improved multi drill cultivator |
| CN105557091A (en) * | 2015-10-13 | 2016-05-11 | 广西五丰机械有限公司 | Subsoiling and tilling device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113118204A (en) * | 2021-04-23 | 2021-07-16 | 北京林大林业科技股份有限公司 | Device and method suitable for soil in-situ remediation |
| CN113118204B (en) * | 2021-04-23 | 2022-09-09 | 北京林大林业科技股份有限公司 | Device and method suitable for soil in-situ remediation |
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| Publication number | Publication date |
|---|---|
| CN112586109B (en) | 2023-02-28 |
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