CN111272470B - Surveying mechanism capable of surveying in multiple directions - Google Patents
Surveying mechanism capable of surveying in multiple directions Download PDFInfo
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- CN111272470B CN111272470B CN202010191077.7A CN202010191077A CN111272470B CN 111272470 B CN111272470 B CN 111272470B CN 202010191077 A CN202010191077 A CN 202010191077A CN 111272470 B CN111272470 B CN 111272470B
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- sleeve
- surveying
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- threaded hollow
- hollow column
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
Abstract
The invention relates to the field of geological survey, and discloses a surveying mechanism capable of surveying in multiple directions, which comprises a fixing frame and a surveying column, wherein a driver is arranged on the surface of the fixing frame, the surveying column is connected with the fixing frame and is driven by the driver, the surveying mechanism can realize the soil sampling operation in multiple directions through a threaded hollow column and multiple column barrels connected to the side wall of the threaded hollow column, namely, after the threaded hollow column is inserted underground, a push ring sleeve can push the multiple column barrels to obliquely slide around by driving the threaded hollow column to rotate, so that the area can be sampled in multiple directions, and even if the soil in the area is complex, a user does not need to spend time drilling into the soil from different angles and taking out the sample, thereby greatly improving the working efficiency of workers.
Description
Technical Field
The invention relates to the field of geological survey, in particular to a surveying mechanism capable of surveying in multiple directions.
Background
Geological survey, namely survey and detection are carried out on geology through various means and methods, a proper holding layer is determined, a foundation type is determined according to the foundation bearing capacity of the holding layer, and the investigation and research activities of basic parameters are calculated.
At present, common survey device is because its structure is fixed, often can only take out the soil sample in a position, but when this regional soil is comparatively complicated (if there are multiple type soil in the below of boring the position, but the sample of taking out does not contain the soil of required type), the user just need spend time to bore into soil and take out the sample from different angles, its operation is comparatively loaded down with trivial details complicated, and multiple operation still can make user's operating time increase, leads to work efficiency to reduce.
Disclosure of Invention
Therefore, the embodiment of the invention provides a surveying mechanism capable of surveying in multiple directions, so as to solve the problem that in the prior art, a common surveying device can only take out a soil sample in one direction at a time, when the soil is complicated, a user needs to spend time drilling into the soil from different angles and taking out the sample, the operation is complicated, complex and time-consuming, and the working efficiency is reduced.
In order to achieve the above object, an embodiment of the present invention provides the following:
a surveying mechanism capable of surveying from multiple directions comprises a fixed frame with a driver arranged on the surface and a surveying column which is connected with the fixed frame and driven by the driver;
survey the post and include the rotatory owner cover with driver output shaft lug connection, the one end that the driver was kept away from to rotatory owner cover is connected with screw thread cavity post, auxiliary sleeve has been cup jointed near the one end of rotatory owner cover to screw thread cavity post, just the other end of screw thread cavity post has been cup jointed the tilt ring, auxiliary sleeve keeps away from the one end of rotatory owner cover and has seted up the screens recess be equipped with in the screens recess with screw thread cavity post connection's promotion ring cover, the one end that auxiliary sleeve was kept away from to promotion ring cover is connected with many column casings of a plurality of, the one end that promotes ring cover was kept away from to many column casings with the inclined plane of tilt ring is connected.
As a preferable scheme of the present invention, the multi-position column casing includes a main sleeve having one end connected to the push ring sleeve, and an inclined sleeve having a right-angled trapezoidal cross section is installed at one end of the main sleeve away from the push ring sleeve.
As a preferred scheme of the present invention, a plurality of sliding strips are installed on an inner wall of the clamping groove, and a sliding groove for limiting the sliding strips is formed on an outer side wall of the pushing ring sleeve.
As a preferable scheme of the present invention, a plurality of inclined bars for increasing soil penetration force are installed at equal intervals on the side wall of the auxiliary sleeve, and the radius value of the auxiliary sleeve is equal to the sum of the radius value of the threaded hollow column and the diameter value of the multi-position column casing.
In a preferred embodiment of the present invention, the tilt ring is composed of two frustums, and a diameter of the tilt ring is the same as a diameter of the auxiliary sleeve.
As a preferable scheme of the invention, a clamping groove is formed in the inner wall of one end, away from the rotary main sleeve, of the threaded hollow column, a fixing sleeve is mounted on the inner wall of the clamping groove, and two inclined stop blocks connected with the inner wall of the fixing sleeve are symmetrically arranged on the inner wall of the fixing sleeve.
In a preferred embodiment of the present invention, the cross section of the inclined block has a v-shaped structure, and the length of the inclined block is greater than 1/2 of the inner diameter of the threaded hollow column.
As a preferable scheme of the invention, the longitudinal section of the rotary main sleeve is in an i-shaped structure, a thread rotating ring is sleeved on the side wall of the rotary main sleeve, a clamping sleeve is mounted on the surface of one side of the thread rotating ring, which is close to a thread hollow column, a clamping rotary table is movably connected in the clamping sleeve, and a mounting column penetrating through the lower end of the rotary main sleeve is mounted on the side surface of the clamping rotary table.
As a preferable scheme of the present invention, the auxiliary sleeve has a plurality of fixing thread grooves formed on a surface of one end thereof adjacent to the rotating main sleeve for fixing the mounting post.
The embodiment of the invention has the following advantages:
the equipment can realize multidirectional soil sampling operation through the threaded hollow column and the multi-position column sleeves connected to the side walls of the threaded hollow column, namely, after the threaded hollow column is inserted into the ground, the threaded hollow column can be driven to rotate to enable the push ring sleeve to push the multi-position column sleeves to obliquely slide towards the periphery, so that multidirectional sampling can be realized for the area, and even if the soil in the area is complicated, a user does not need to spend time to drill into the soil from different angles and take out the sample, so that the working efficiency of workers is greatly improved;
simultaneously this equipment increases the dynamics that the screw thread hollow column bored into soil through the slope strip that sets up at the auxiliary sleeve lateral wall for the idle phenomenon can not appear easily in the screw thread hollow column boring in-process, still can be through oblique dog in order playing the effect that blocks the sample when the screw thread hollow column takes out simultaneously, avoids the loose condition emergence that spills in the screw thread hollow column of following of soil sample.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary and that other implementation drawings may be derived from the provided drawings by those of ordinary skill in the art without inventive effort.
The structures, the proportions, the sizes, and the like shown in the specification are only used for matching with the contents disclosed in the specification, so that those skilled in the art can understand and read the present invention, and do not limit the conditions for implementing the present invention, so that the present invention has no technical essence, and any modifications of the structures, changes of the proportion relation, or adjustments of the sizes, should still fall within the scope of the technical contents disclosed in the present invention without affecting the efficacy and the achievable purpose of the present invention.
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a bottom view of the pouch in accordance with an embodiment of the present invention;
fig. 3 is a schematic cross-sectional view of the fixing cover according to the embodiment of the present invention;
FIG. 4 is a front view of a survey pole of an embodiment of the present invention;
fig. 5 is a schematic cross-sectional structure view of a main rotating sleeve according to an embodiment of the present invention.
In the figure:
1-a fixed mount; 2-a survey column; 3, fixing a sleeve;
201-rotating the main sleeve; 202-threaded hollow post; 203-an auxiliary sleeve; 204-inclined ring; 205-detent recess; 206-push ring sleeve; 207-multi-position column casing; 208-a main sleeve; 209-beveled cannula; 210-a slider; 211-a chute; 212-oblique bars; 213-a frustum; 214-a retaining groove; 215-threaded swivel; 216-a clamping sleeve; 217-position clamping rotary table; 218-fixed thread groove; 219-mounting post;
301-inclined stops.
Detailed Description
The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the present invention provides a surveying mechanism capable of performing multi-azimuth surveying, which can perform multi-azimuth soil sampling operation through a threaded hollow column 202 and a multi-position column 207 connected to a sidewall of the threaded hollow column 202, thereby greatly improving the working efficiency of workers; this equipment is through setting up the dynamics that the screw thread hollow column bored into soil in the slope strip 212 of auxiliary sleeve 203 lateral wall increases simultaneously for the idle phenomenon can not appear easily boring the in-process in the screw thread hollow column, still can be through oblique dog 301 in order playing the effect that blocks the sample when screw thread hollow column 202 takes out simultaneously, avoids the loose condition emergence that spills in screw thread hollow column 202 of following of soil sample.
The surveying mechanism of the embodiment comprises a fixed frame 1 with a surface mounted driver and a surveying column 2 which is connected with the fixed frame 1 and is driven by the driver, wherein the fixed frame 1 can drive the surveying column 2 to rise or fall, namely a push rod is arranged on the fixed frame 1, the surveying column 2 can be driven by the driver to rotate, and the driver can be set as a motor;
as shown in fig. 1 and 4, the survey pole 2 includes a rotary main sleeve 201 directly connected to the driver output shaft, the rotary main sleeve 201 can be driven by the driver output shaft to rotate, one end of the rotary main sleeve 201 far away from the driver is connected to a threaded hollow column 202, the threaded hollow column 202 is connected to the rotary main sleeve 201 and can move along with the rotary main sleeve 201, that is, the rotary main sleeve 201 rotates (stops), the threaded hollow column 202 also rotates (stops), one end of the threaded hollow column 202 near the rotary main sleeve 201 is sleeved with an auxiliary sleeve 203, the other end of the threaded hollow column 202 is sleeved with a tilt ring 204, the tilt ring 204 is present for assisting the multi-position column 207 to tilt to take out soil samples in multiple directions, one end of the auxiliary sleeve 203 far away from the rotary main sleeve 201 is provided with a detent groove 205, a push ring sleeve 206 connected to the threaded hollow column 202 is arranged in the detent groove 205, the threaded hollow column 202 and the pushing ring sleeve 206 are connected in a threaded manner, the pushing ring sleeve 206 can move along the threaded hollow column 202 when the threaded hollow column 202 rotates, the working principles of the threaded hollow column 202 and the pushing ring sleeve can refer to a screw rod and a sliding sleeve, one end of the pushing ring sleeve 206, which is far away from the auxiliary sleeve 203, is connected with a plurality of multi-position column sleeves 207, and one end of the multi-position column sleeves 207, which is far away from the pushing ring sleeve 206, is connected with the inclined surface of the inclined ring 204.
The survey pole 2 can realize multi-azimuth sampling operation, and in the implementation, the driver can be directly turned on, so that the rotary main sleeve 201 carries the threaded hollow pole 202 to move together (at this time, the auxiliary sleeve 203 is limited by the rotary main sleeve 201, that is, when the threaded hollow pole 202 is driven, the auxiliary sleeve 203 rotates together, and the threaded hollow pole 202 and the auxiliary sleeve 203 are driven to rotate, so as to facilitate drilling into the ground, because the threaded hollow pole 202 and the auxiliary sleeve 203 have a rotary force, soil can be scraped without affecting the drilling of the survey pole 2), and meanwhile, the threaded hollow pole 202 is pressed down, so that the survey pole 2 is drilled into the ground, and because the threaded hollow pole 202 is of a hollow structure (as shown in fig. 1, 2, 3 and 5), the threaded hollow pole 202 drilled into the ground can take out soil samples distributed in a straight line in the area.
Then, when the threaded hollow column 202 reaches the set position, the auxiliary sleeve 203 can be released from the restriction of the rotating main sleeve 201, and then the rotating main sleeve 201 is driven to rotate, because the auxiliary sleeve 203 directly contacts the soil, the soil can press the auxiliary sleeve 203, so that the auxiliary sleeve 203 cannot move easily, when the rotating main sleeve 201 rotates, only the threaded hollow column 202 rotates, but the auxiliary sleeve 203 cannot rotate easily, and because the plurality of sliding bars 210 are installed on the inner wall of the blocking groove 205, and the sliding groove 211 for limiting the sliding bar 210 is arranged on the outer side wall of the pushing ring sleeve 206, when the threaded hollow column 202 rotates, the pushing ring sleeve 206 is driven to move, because the sliding groove 211 is arranged on the side wall of the pushing ring sleeve 206, and the sliding bar 210 is arranged in the sliding groove 211, the pushing ring sleeve 206 cannot rotate together with the threaded hollow column 202, but slides along the threaded hollow column 202 (because the pushing ring 206 is subjected to a restriction force, therefore, when the threaded hollow column 202 rotates, the pushing ring 206 slides up and down through the threads, and the pushing ring 206 should be driven to slide down along the threaded hollow column 202 because sampling is required).
Then the pushing ring sleeve 206 sliding downwards pushes the multi-position cylinder 207 to contact the inclined ring 204, because the inclined ring 204 is composed of two conical platforms 213, and the diameter of the inclined ring 204 is the same as that of the auxiliary sleeve 203, the pushing ring sleeve 206 sliding downwards continuously pushes the end of the multi-position cylinder 207 to slide along the inclined plane of the conical platform 213 first, then the multi-position cylinder 207 contacts the end of the conical platform 213 (the position with the largest diameter of the conical platform 213) to be inclined, then the pushing ring sleeve 206 is pressed downwards continuously to push the multi-position cylinder 207 to be inclined to be inserted into the soil around the threaded hollow cylinder 202 to take out samples in multiple directions (the inclined angle of the multi-position cylinder 207 is controlled by the conical platform 213, and a user can select installation according to actual conditions), after the samples in multiple directions are completely collected, the threaded hollow cylinder 202 can be driven in the opposite direction to reset the multi-position cylinder 207 until the pushing ring sleeve 206 is completely clamped in the clamping groove 205, the auxiliary sleeve 203 is then continued to be restrained by the rotating main sleeve 201 while the rotating main sleeve 201 is driven in the opposite direction and the survey pole 2 is pulled out so that the removed sample is lifted to the surface.
As shown in fig. 1 and 4, the multi-position cylinder 207 includes a main sleeve 208 connected to the pushing collar 206 at one end, and an inclined sleeve 209 having a right-angled trapezoidal cross-section is installed at an end of the main sleeve 208 remote from the pushing collar 206.
The main sleeve 208 is present for storing samples around the threaded hollow column 202, when the inclined sleeve 209 is used, if only a sample in a straight orientation (directly below a survey point) is taken, the threaded hollow column 202 can fully meet the purpose, at this time, the inclined sleeve 209 is attached to the inclined surface of the frustum 213 to avoid the influence on the subsequent sampling operation (a clamping table can be arranged on the frustum 213 to enable the inclined sleeve 209 to be attached to the frustum 213), if a multi-orientation sample needs to be taken out, the operation can be carried out, and the inclined sleeve 209 is arranged to facilitate the insertion of soil and the taking out of the sample.
As shown in fig. 1, 4 and 5, a plurality of inclined bars 212 for increasing the soil penetration force are installed at equal intervals on the side wall of the auxiliary sleeve 203, and the radius value of the auxiliary sleeve 203 is equal to the sum of the radius value of the threaded hollow column 202 and the diameter value of the multi-position column 207.
The arrangement of this slope strip 212 is in order to increase the soil penetration force of surveying post 2, its specific structure can refer to fig. 1 and fig. 4, when surveying post 2 and boring into soil, the slope strip 212 of slope can exert the power that is the slope form to soil for soil can fully crowd the convenient shaft of column and get into, this slope strip 212 still can play the effect of restriction auxiliary sleeve 203 simultaneously, when making survey post 2 and taking a sample in many directions, auxiliary sleeve 203 can not influence the normal clear of sample operation, and the size of so setting up auxiliary sleeve 203 is in order to make the degree of difficulty of boring into of surveying post 2 reduce.
As shown in fig. 1, fig. 2 and fig. 3, a locking groove 214 is formed in an inner wall of one end of the threaded hollow column 202, which is far away from the rotary main sleeve 201, a fixed sleeve 3 is installed on the inner wall of the locking groove 214, and two inclined stoppers 301 connected with the inner wall of the fixed sleeve 3 are symmetrically arranged on the inner wall of the fixed sleeve 3.
The inclined stop block 301 is arranged to stop the sample taken out from the screw thread hollow column 202, when the screw thread hollow column 202 is drilled into soil, the soil sample can push the inclined stop block 301 (the inclined stop block 301 and the fixing sleeve 3 are connected in a rotating mode) to enter the screw thread hollow column 202, and then once the screw thread hollow column 202 is taken out, the sample can press the inclined stop block 301, so that the sample can not fall off easily.
The cross section of the inclined block 301 is in a 'hook' shape, and the length of the inclined block 301 is greater than 1/2 of the inner diameter of the threaded hollow column 202, so that the structure and the size of the inclined block 301 are set to make soil more easily enter the threaded hollow column 202, and can fully block a sample to avoid the sample from falling, and the specific structure is shown in fig. 2 and fig. 3.
As shown in fig. 5, the longitudinal section of the rotary main sleeve 201 is an i-shaped structure, the side wall of the rotary main sleeve 201 is sleeved with a screw thread rotating ring 215, one side surface of the screw thread rotating ring 215, which is close to the screw thread hollow column 202, is provided with a clamping sleeve 216, a clamping rotary table 217 is movably connected in the clamping sleeve 216, the side surface of the clamping rotary table 217 is provided with an installation column 219 which runs through the lower end of the rotary main sleeve 201, and the auxiliary sleeve 203 is provided with a plurality of fixed screw thread grooves 218 which fix the installation column 219 on one end surface which is close to the rotary main sleeve 201.
The main rotary sleeve 201 can limit the auxiliary sleeve 203 to meet the requirement of a user for multi-directional sampling, when the multi-directional sampling is carried out, if the whole survey column 2 needs to be drilled into the ground, the whole survey column 2 should be rotated, so that the drilling process is not affected, a user can rotate the threaded rotary ring 215 (the threaded rotary ring 215 and the main rotary sleeve 201 are in threaded connection) to move the threaded rotary ring towards the threaded hollow column 202 along the main rotary sleeve 201, then the movable threaded rotary ring 215 can push the clamping sleeve 216 and the clamping rotary table 217 to move together (the clamping rotary table 217 can move freely on the clamping sleeve 216), because the mounting column 219 is mounted on the side surface of the clamping rotary table 217, when the clamping rotary table 217 moves towards the threaded hollow column 202, the mounting column 219 can be gradually inserted into the fixed threaded groove 218, after the mounting column 219 fixes the threaded groove 218, the mounting column 219 can be rotated to screw into the fixed threaded groove 218, this achieves the restricting operation of the auxiliary sleeve 203.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, it is intended that all such modifications and alterations be included within the scope of this invention as defined in the appended claims.
Claims (8)
1. A survey mechanism capable of surveying in multiple directions is characterized by comprising a fixed frame (1) provided with a driver on the surface and a survey column (2) connected with the fixed frame (1) and driven by the driver;
the surveying column (2) comprises a rotary main sleeve (201) directly connected with an output shaft of a driver, one end, far away from the driver, of the rotary main sleeve (201) is connected with a threaded hollow column (202), one end, close to the rotary main sleeve (201), of the threaded hollow column (202) is sleeved with an auxiliary sleeve (203), the other end of the threaded hollow column (202) is sleeved with a tilting ring (204), one end, far away from the rotary main sleeve (201), of the auxiliary sleeve (203) is provided with a clamping groove (205), a pushing ring sleeve (206) connected with the threaded hollow column (202) is arranged in the clamping groove (205), one end, far away from the auxiliary sleeve (203), of the pushing ring sleeve (206) is connected with a plurality of multi-position column sleeves (207), and one end, far away from the pushing ring sleeve (206), of the multi-position column sleeves (207) is connected with an inclined plane of the tilting ring (204);
the multi-position column sleeve (207) comprises a main sleeve (208) of which one end is connected with the pushing ring sleeve (206), and one end, far away from the pushing ring sleeve (206), of the main sleeve (208) is provided with an inclined sleeve (209) of which the cross section is of a right-angled trapezoidal structure.
2. The surveying instrument capable of conducting multi-azimuth surveying according to claim 1, wherein a plurality of sliding bars (210) are mounted on an inner wall of the positioning groove (205), and sliding grooves (211) for limiting the sliding bars (210) are formed on an outer side wall of the pushing ring sleeve (206).
3. A surveying arrangement according to claim 1, characterized in that the side walls of the auxiliary sleeve (203) are equally spaced by a number of oblique bars (212) for increasing the soil penetration force, and that the radius of the auxiliary sleeve (203) is equal to the sum of the radius of the threaded hollow cylinder (202) and the diameter of the multi-position cylinder (207).
4. A surveying arrangement according to claim 1, characterized in that the tilting ring (204) consists of two frustums (213) and that the diameter of the tilting ring (204) is the same as the diameter of the auxiliary sleeve (203).
5. The surveying mechanism capable of conducting multi-azimuth surveying according to claim 1, wherein a retaining groove (214) is formed in an inner wall of one end of the threaded hollow column (202) far away from the rotating main sleeve (201), a fixing sleeve (3) is mounted on the inner wall of the retaining groove (214), and two inclined stoppers (301) connected with the inner wall of the fixing sleeve (3) are symmetrically arranged on the inner wall of the fixing sleeve (3).
6. A surveying arrangement capable of multiple azimuth surveying according to claim 5, characterized in that the cross-section of the oblique stop (301) is of a "V" configuration and the length of the oblique stop (301) has a value larger than 1/2 of the inner diameter of the threaded hollow cylinder (202).
7. The surveying mechanism that can diversely survey according to claim 1, characterized in that, the longitudinal section of rotatory main cover (201) is the I shape structure, and has cup jointed screw thread swivel (215) at the lateral wall of rotatory main cover (201), screw thread swivel (215) is close to one side surface mounting position cover (216) of screw thread hollow column (202), swing joint has screens revolving stage (217) in screens cover (216), the side-mounting position post (219) that runs through rotatory main cover (201) lower extreme is installed to the screens revolving stage (217) of side.
8. A surveying arrangement according to claim 1, characterized in that the auxiliary sleeve (203) has a number of fastening screw grooves (218) on its end surface near the rotating main sleeve (201) for fastening the mounting posts (219).
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| CN202010191077.7A CN111272470B (en) | 2020-03-18 | 2020-03-18 | Surveying mechanism capable of surveying in multiple directions |
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| CN202010191077.7A CN111272470B (en) | 2020-03-18 | 2020-03-18 | Surveying mechanism capable of surveying in multiple directions |
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| JP4313598B2 (en) * | 2002-11-15 | 2009-08-12 | 有限会社高尾商事 | Geological survey equipment |
| CN207332874U (en) * | 2017-10-12 | 2018-05-08 | 遵义师范学院 | A kind of soil sampling apparatus |
| CN207516059U (en) * | 2017-11-10 | 2018-06-19 | 董硕 | A kind of geological exploration soil sample collector |
| CN108375487A (en) * | 2018-01-31 | 2018-08-07 | 河南铁恒新材料科技有限公司 | Cement sampling detecting device |
| CN208125422U (en) * | 2018-05-04 | 2018-11-20 | 夏翔燕 | A kind of geologic prospect drawing out soil equipment |
| CN108613828B (en) * | 2018-05-14 | 2023-07-18 | 天津远洋泓基电子工程有限公司 | Geological exploration sampler |
| CN209148341U (en) * | 2018-12-04 | 2019-07-23 | 阿坝藏族羌族自治州林业科学技术研究所 | A kind of dry valley soil property sampler |
| CN209858255U (en) * | 2019-03-26 | 2019-12-27 | 张荣才 | Novel engineering geology reconnaissance sample device |
| CN210071372U (en) * | 2019-04-10 | 2020-02-14 | 辽宁北方环境检测技术有限公司 | Soil sampling device for environmental monitoring |
| CN210108756U (en) * | 2019-04-20 | 2020-02-21 | 山东科技大学 | A ground sampling device for among geotechnical engineering |
| CN110763513A (en) * | 2019-12-05 | 2020-02-07 | 宁夏灵智科技有限公司 | Novel annular sampling of soil is used in agricultural research device |
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