CN209525345U - A kind of undisturbed soil impact resilience measurement device - Google Patents
A kind of undisturbed soil impact resilience measurement device Download PDFInfo
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- CN209525345U CN209525345U CN201920241856.6U CN201920241856U CN209525345U CN 209525345 U CN209525345 U CN 209525345U CN 201920241856 U CN201920241856 U CN 201920241856U CN 209525345 U CN209525345 U CN 209525345U
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Abstract
The utility model discloses a kind of undisturbed soil impact resilience measurement device, including water supplying unit and unit is washed away, water supplying unit includes constant pressure water tank, water supply line, valve and flowmeter；Washing away unit includes pedestal, two stands, scour trough, stable chute, sampling spoon, pedotheque slot and sampling tank, and two stands lower end is fixed on the base, and the upper end of two stands is arranged in scour trough both ends；Sampling spoon is set in pedotheque slot, and sampling tank is set to the lower section of pedotheque slot；Scour trough, stable chute and pedotheque slot are integrally formed to be formed, scour trough both ends respectively sink formed two rectangular chambers with bottom and surrounding side wall, wherein be located at higher-end chamber constitute stable chute, positioned at lower end chamber constitute pedotheque slot；The width of scour trough groove face is greater than wall being equidistant apart from scour trough left and right sides wall at left and right sides of the width of pedotheque slot and pedotheque slot.The device makes water flow uniformly through undisturbed soil surface, avoids leak and leaks husky phenomenon.
Description
Technical field
The utility model relates to soil erosion study technical fields, and in particular to a kind of undisturbed soil impact resilience measurement device.
Background technique
Soil anti-scouribility is the mechanical damage and the performance that moves down of promotion that soil resists runoff, it is between grogs and micro-structure
Between bond and ped between to resist discrete ability in close relations, substantially having reacted soil, to resist runoff waterpower broken
The bad ability acted on and carry.The research method of soil anti-scouribility can be summed up in the following categories at present: hydrostatic is disintegrated method, undisturbed soil
It washes away channel process, field and discharges water on the spot and the method for washing away, runoff plots analysis method and indoors artificial simulated rainfall and discharge water and wash away examination
Test the method combined.And undisturbed soil wash away channel process due to its convenient test, convenient for field carry, water consumption is less, is not handed over
The advantages that leading to the limitation of landform etc., and capable of preferably reflecting the actual conditions for collecting condition and soil sample stress of runoff, is current
A kind of widely used method.
Undisturbed soil washes away the undisturbed soil that channel process is Mr.'s Jiang Dingsheng design and washes away sink, the undisturbed soil sample that then will be taken
It is placed on the method for discharging water in the sink of gradient adjustable and washing away and being formed.And existing undisturbed soil flush water channel process is mostly in Jiang Dingsheng
The improvement carried out on the basis of sink is washed away in Mr.'s design, such as to the side such as water supply device, sampler size, slope conditioning
The improvement that face carries out.
But existing undisturbed soil washes away channel process experimental provision and still remains following deficiency: 1, scour trough two sidewalls and soil
Sample cell two sidewalls maintain an equal level, and in scour process, side wall water flow is more concentrated, and it is larger to wash away dynamics to the edge on soil sample surface layer, make
It obtains entire soil sample surface layer to wash away unevenly, generates larger experimental error；2, sampling spoon is placed in pedotheque slot, outside cutting ring
There are certain intervals with pedotheque slot inner wall for wall, and sealing effect is bad, and water flow is easily lost from gap in scour process, shadow
Ring experiment effect；3, self-control sampling spoon is when squeezing into soil, without matched cutting ring handle, generally with plank pad on cutting ring
Portion directly taps plank with hammer, there is firmly imbalance, is easy the position for making cutting ring in soil inclination, it is also possible to can dynamics
It is overweight, so that undisturbed soil top is compacted by plank.
Summary of the invention
In view of the above shortcomings of the prior art, the purpose of this utility model be that a kind of water flow is provided can uniform flow
Pedotheque surface is crossed, leak is avoided and leaks husky phenomenon, the accurate undisturbed soil impact resilience measurement device of impact resilience assessment of indices.
The technical solution of the utility model is achieved in that
A kind of undisturbed soil impact resilience measurement device, including water supplying unit and unit is washed away, the water supplying unit includes constant pressure
Water tank, water supply line, valve and flowmeter, the constant pressure water tank are equipped with water inlet, water outlet, air inlet and gas vent, institute
Air inlet position is stated equipped with air inlet pipe, the air inlet pipe is inserted into constant pressure water tank bottom and has certain altitude apart from constant pressure water tank bottom,
Described water supply line one end is connect with constant pressure water tank water outlet, and the other end is connect with unit is washed away；The valve and flowmeter are set
It sets on water supply line, for controlling the flow for washing away soil.
The unit that washes away includes pedestal, bracket, scour trough, stable chute, sampling spoon, pedotheque slot and sampling tank,
The bracket is two sets, and two stands lower end is fixed on the base, and the upper end of two stands is arranged in by propping up in the scour trough both ends
Frame is supported scour trough, and scour trough is obliquely installed to form one end high and another end low, and at least a set of bracket liftable is with can
The gradient of scour trough is adjusted by the lifting of bracket；The stable chute be arranged in the higher-end of scour trough and with water supplying unit
Water supply line connection；The pedotheque slot is arranged in the lower end of scour trough, and the groove bottom of stable chute and pedotheque slot is equal
Lower than scour trough groove bottom；The sampling spoon is set in pedotheque slot, and the sampling tank is set to the lower section of pedotheque slot,
For collecting water and sandstone.
The scour trough, stable chute and pedotheque slot are integrally formed to be formed, and respectively sink to forming band at scour trough both ends
Two rectangular chambers at bottom and surrounding side wall, wherein the chamber for being located at higher-end constitutes the stable chute, positioned at the chamber of lower end
Constitute the pedotheque slot；The width of scour trough groove face is greater than wall at left and right sides of the width of pedotheque slot and pedotheque slot
Apart from being equidistant for scour trough left and right sides wall.
Further, the sampling spoon is surrounded the rectangular frame structure of the upper and lower side opening formed by four sides side wall, sampling
The upper end of wall and the top side wall close to stable chute vertically turns down outward at left and right sides of cutting ring forms overlap joint overlap edge, the punching
Brush slot groove bottom is located at region at left and right sides of pedotheque slot near wall and scour trough groove bottom is located at pedotheque slot and leans on
The region of the top adjacent sidewalls of nearly stable chute is equipped with the step of sinking corresponding with overlap edge, and the sampling spoon is located at soil
In sample cell, the overlap edge of sampling spoon is buckled on the step of scour trough slot bottom sinking and makes to take by the setting of step convergence depth
The upper surface of sample cutting ring is generally aligned in the same plane with scour trough groove bottom.
Further, it is equipped with rubber sheet gasket between the step that the overlap edge of sampling spoon and scour trough slot bottom sink, prevented
The leakage of leak-stopping water is husky；Step convergence depth is sampling spoon overlap edge thickness with the sum of rubber sheet gasket thickness.
Further, sampling spoon close to the overlap edge of stable chute both ends and left and right sides overlap edge be connected as one with
Right angle U-shaped structure overlap edge is formed, three sections of steps that scour trough slot bottom is formed are connected as one to be formed and be taken with right angle U-shaped structure
The corresponding right angle U-shaped structure step of edge fit.
It further, further include cutting ring handle, the cutting ring handle is a rectangular groove structure put upside down, and notch is downward, the square
The rectangle size of shape slot groove face is consistent with sampling spoon, and cutting ring handle two sidewalls lower end is vertically turned down outward to be formed and be sampled
The corresponding support edge of overlap edge at left and right sides of cutting ring, support edge overlap edge cooperation corresponding with sampling spoon, convenient in original soil
It exerts oneself in sampling process to cutting ring handle, sampling spoon is inserted into undisturbed soil and undisturbed soil is avoided to be compacted.
Further, diversion trench, the groove bottom and pedotheque of the diversion trench are equipped in the lower end of pedotheque slot
The groove bottom of slot is integrally formed to be formed and be generally aligned in the same plane, and the higher-end groove bottom of the diversion trench and scour trough slot bottom
Face equivalent width and extend downwardly along gradient direction while becomes narrow gradually the diversion trench groove bottom to form trapezium structure；It is described to lead
Chute is connect close to the lower end of the top side wall of pedotheque slot with diversion trench groove bottom, upper end and corresponding scour trough groove bottom
Connection；While two cell wall of left and right of the diversion trench is extended downwardly by the two sidewalls of scour trough along gradient direction between two sidewalls
It to be formed away from being connect after gradually becoming smaller with diversion trench groove bottom corresponding sides, so that the diversion trench notch formed is closing-in structure, it is described
Sampling tank is arranged below diversion trench notch.
Compared with prior art, the utility model has the following beneficial effects:
1, the width of the utility model scour trough groove face is greater than the width of pedotheque slot, in scour process, so that water
Stream flows uniformly through pedotheque surface, so that the concentrated flow for effectively preventing washing away groove sidewall generation washes away by force pedotheque
Influence, and then guarantee measurement result accuracy.
2, the sinking step for overlap edge and scour trough the groove bottom setting being arranged on three side wall of sampling spoon is cooperatively connected, and
Sealing effect is played by rubber sheet gasket, avoids in scour process water flow and silt from the junction of sampling spoon and scour trough
It is lost, to guarantee the accuracy of experimental result.
3, the support edge for the overlap edge and cutting ring handle being arranged on three wall of sampling spoon is used cooperatively, and taps cutting ring handle centre bit
It sets, the power uniform concentration that sampling spoon can be made to be driven into soil avoids inclined degree of the sampling spoon in soil, while because not being
It directly exerts oneself in sampling spoon middle and upper part, so that real phenomenon is hit in the undisturbed soil appearance effectively prevented in sampling spoon.
Detailed description of the invention
Fig. 1-the utility model structure diagram.
Top view at Fig. 2-scour trough lower end.
Fig. 3-sampling spoon structural schematic diagram.
Fig. 4-cutting ring handle structure schematic diagram
Wherein: 1- sampling spoon；2- cutting ring handle；3- pedotheque slot；4- scour trough；5- stable chute；6- sampling tank；7- branch
Frame；8- pedestal；9- water supply line；10- valve；11- flowmeter；12- constant pressure water tank；13- water inlet；14- air inlet pipe；15- row
Stomata；16- diversion trench；17- overlap edge；The support edge 18-.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
Referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4,1, a kind of undisturbed soil impact resilience measurement device, including water supplying unit and wash away list
Member, the water supplying unit include constant pressure water tank 12, water supply line 9, valve 10 and flowmeter 11, and the constant pressure water tank 12 is equipped with
Water inlet 13, water outlet, air inlet and gas vent 15, the air inlet position are equipped with air inlet pipe 14, and the air inlet pipe 14 is inserted into perseverance
Pressure 12 bottom of water tank simultaneously have certain altitude apart from constant pressure water tank bottom, while make air inlet pipe lower end nozzle be always positioned at liquid level with
Under, and often make air inlet pipe lower end nozzle apart from 1 ~ 2cm of constant pressure water tank bottom or so, described 9 one end of water supply line and constant pressure water tank
The connection of 12 water outlets, the other end are connect with unit is washed away；The valve 10 and flowmeter 11 are arranged on water supply line 9, are used for
The flow of soil is washed away in control.The constant pressure water tank 12 makes according to Markov bottle principle, and sustainable constant pressure water supply guarantees water flow
Constant flow rate.The operating process of the constant pressure water tank adds water into constant pressure water tank from water inlet, adds the unsuitable overfill of water every time,
Water inlet is closed after adding water, the gas vent and air inlet pipe of the constant pressure water tank are normally open, to guarantee in constant pressure water tank
Pressure is constant, with stable current scour pedotheque, guarantees the accuracy of measurement result.
The unit that washes away includes pedestal 8, bracket 7, scour trough 4, stable chute 5, sampling spoon 1, pedotheque slot 3 and adopts
Sample bucket 6, the bracket 7 are two sets, and 7 lower end of two stands is fixed on pedestal 8, and two stands 7 are arranged in 4 both ends of scour trough
To be supported by bracket 7 to scour trough 4, scour trough 4 is obliquely installed to form one end high and another end low for upper end, and at least a set of
7 liftable of frame by the lifting of bracket 7 can adjust the gradient of scour trough 4；The stable chute 5 be arranged in scour trough 4 compared with
High-end and water supply line 9 with water supplying unit is connect；The lower end of scour trough 4,5 He of stable chute is arranged in the pedotheque slot
The groove bottom of pedotheque slot 3 is below 4 groove bottom of scour trough；The sampling spoon 1 is set in pedotheque slot 3, described to adopt
Sample bucket 6 is set to the lower section of pedotheque slot 3, for collecting water and sandstone.
The scour trough 4, stable chute 5 and pedotheque slot 3, which are integrally formed, to be formed, and is sunk respectively shape at 4 both ends of scour trough
At two rectangular chambers with bottom and surrounding side wall, wherein the chamber for being located at higher-end constitutes the stable chute 5, positioned at lower end
Chamber constitutes the pedotheque slot 3；It can be designed so that stable chute and scour trough and scour trough and pedotheque slot in this way
Between connect seamless, reduce influence of the connecting factors to experimental result, improve the accuracy of experimental result；Meanwhile one at
Type preparation facilities not only reduces raw material, and the accuracy of device is high.The width of 4 groove face of scour trough is greater than pedotheque slot 3
Width and 3 left and right sides wall of pedotheque slot being equidistant apart from 4 left and right sides wall of scour trough.Water can thus be made
For stream during washing away undisturbed soil, water flow can be evenly laid out on soil sample surface layer, avoids the concentrated flow for washing away groove sidewall generation
Influence to soil sample surface layer guarantees the accuracy of experimental result.
The sampling spoon 1 is surrounded the rectangular frame structure of the upper and lower side opening formed, sampling spoon 1 or so by four sides side wall
Two sidewalls and the upper end of the top side wall close to stable chute 5 vertically turn down outward and form overlap joint overlap edge 17, the scour trough 4
Groove bottom be located at region near 3 left and right sides wall of pedotheque slot and 4 groove bottom of scour trough to be located at pedotheque slot 3 close
The region of the top adjacent sidewalls of stable chute 5 is equipped with the step of sinking corresponding with overlap edge 17, and the sampling spoon 1 is located at soil
In earth sample cell 3, the overlap edge 17 of sampling spoon 1 is buckled on the step of 4 slot bottom of scour trough sinking and by step convergence depth
Being arranged is generally aligned in the same plane the upper surface of sampling spoon 1 with 4 groove bottom of scour trough.Overlap edge 17 and punching in sampling spoon 1
It is equipped with rubber sheet gasket between the step that 4 slot bottom of brush slot sinks, prevents leak leakage husky；Step convergence depth is the overlap joint of sampling spoon 1
17 thickness of side is with the sum of rubber sheet gasket thickness.
In this way because of the setting of overlap edge and step, water flow can pass through sampling spoon soil surface, to avoid washing away
The water flow of slot flows into the gap between sampling spoon and pedotheque slot, and further increases sealing effect by rubber sheet gasket.
There are gaps to effectively solving between traditional sampling spoon and pedotheque slot, and sealing effect is bad, in scour process water flow and
The technical issues of silt is easily lost from gap, influences experiment effect, to improve the accuracy of measuring result.
Sampling spoon 1 is connected as one close to the both ends of the overlap edge 17 of stable chute 5 and left and right sides overlap edge 17 with shape
At right angle U-shaped structure overlap edge, three sections of steps that 4 slot bottom of scour trough is formed are connected as one to be formed and be taken with right angle U-shaped structure
The corresponding right angle U-shaped structure step of edge fit 17.Overlap edges all in this way are connected as one, it is possible to prevente effectively from close to stable chute
Overlap edge there are tiny gaps with left and right sides overlap edge, and then can guarantee the accuracy of experimental result.
It further include cutting ring handle 2, the cutting ring handle 2 is a rectangular groove structure put upside down, and notch is downward, the rectangular channel groove face
Rectangle size and sampling spoon 1 it is consistent, the 2 two sidewalls lower end of cutting ring handle is vertically turned down outward to be formed and sampling spoon 1
The corresponding support edge 18 of left and right sides overlap edge, the overlap edge 17 corresponding with sampling spoon 1 of support edge 18 cooperates, convenient in original
It exerts oneself in native sampling process to cutting ring handle 2, sampling spoon 1 is inserted into undisturbed soil and undisturbed soil is avoided to be compacted.In this way, sampling
The support edge of overlap edge and cutting ring handle can be used cooperatively at left and right sides of cutting ring, tap cutting ring handle center, so that it may make to sample
Cutting ring is driven into the power uniform concentration in soil, avoids inclined degree of the sampling spoon in soil, while because not being in sampling spoon
Top is directly exerted oneself, so that real phenomenon is hit in the undisturbed soil appearance effectively prevented in sampling spoon.
The size length × width × height of sampling spoon is 20cm × 10cm × 10cm, the length of cutting ring handle × wide in the present embodiment
For 20cm × 10cm, and height is set according to actual needs, need to only guarantee the overlap edge and branch of sampling spoon in use
Support side can cooperate.
Diversion trench 16, groove bottom and the pedotheque slot 3 of the diversion trench 16 are equipped in the lower end of pedotheque slot 3
Groove bottom is integrally formed to be formed and be generally aligned in the same plane, and the higher-end groove bottom of the diversion trench 16 and 16 slot bottom of scour trough
Face equivalent width and extend downwardly along gradient direction while becomes narrow gradually the diversion trench groove bottom to form trapezium structure；It is described to lead
Chute is connect close to the lower end of the top side wall of pedotheque slot with diversion trench groove bottom, upper end and corresponding scour trough groove bottom
Connection；While two cell wall of left and right of the diversion trench is extended downwardly by the two sidewalls of scour trough along gradient direction between two sidewalls
It to be formed away from being connect after gradually becoming smaller with diversion trench groove bottom corresponding sides, so that the diversion trench notch formed is closing-in structure, it is described
Sampling tank is arranged below diversion trench notch.Water flow and silt can be smoothly collected in this way, improve the accuracy of experimental result.
The utility model calculates soil anti-impact index, i.e. ANS=T/ advantageously by with washout 1g dry ground required time
WLDS, in formula: ANS is soil anti-impact index (min/g)；T is flushing time (min)；WLDS is washout dry ground weight (g)；It does not examine
The problem of water is washed away in worry, and can be adjusted by telescoping shoring column and wash away trough slope, so as to be calculated on different slopes
It spends lower difference to wash away under flow, the soil anti-impact index of undisturbed soil sample.
Finally, it should be noted that the above embodiments of the present invention is only to illustrate act made by the utility model
Example, and it is not the restriction to the utility model embodiment.For those of ordinary skill in the art, it is stated upper
Other various forms of variations and variation can also be made on the basis of bright.Here all embodiments can not be given thoroughly
It lifts.All the technical solution of the utility model changes and variations that derived from that belong to are still in the utility model
Protection scope column.
Claims (6)
1. a kind of undisturbed soil impact resilience measurement device, including water supplying unit and unit is washed away, the water supplying unit includes constant pressure water
Case, water supply line, valve and flowmeter, the constant pressure water tank is equipped with water inlet, water outlet, air inlet and gas vent, described
Air inlet position is equipped with air inlet pipe, and the air inlet pipe is inserted into constant pressure water tank bottom and has certain altitude apart from constant pressure water tank bottom, institute
It states water supply line one end to connect with constant pressure water tank water outlet, the other end is connect with unit is washed away；The valve and flowmeter setting
On water supply line, for controlling the flow for washing away soil；
The unit that washes away includes pedestal, bracket, scour trough, stable chute, sampling spoon, pedotheque slot and sampling tank, described
Bracket is two sets, and two stands lower end is fixed on the base, and the upper end of two stands is arranged in by bracket pair in the scour trough both ends
Scour trough is supported, and scour trough is obliquely installed to form one end high and another end low, and at least a set of bracket liftable is can pass through
Bracket goes up and down to adjust the gradient of scour trough；The higher-end of scour trough and the water supply with water supplying unit is arranged in the stable chute
Pipeline connection；The pedotheque slot is arranged in the lower end of scour trough, and the groove bottom of stable chute and pedotheque slot is below
Scour trough groove bottom；The sampling spoon is set in pedotheque slot, and the sampling tank is set to the lower section of pedotheque slot, is used for
Collect water and sandstone；It is characterized by:
The scour trough, stable chute and pedotheque slot are integrally formed to be formed, scour trough both ends respectively sink formed band bottom and
Two rectangular chambers of surrounding side wall, wherein the chamber for being located at higher-end constitutes the stable chute, the chamber positioned at lower end is constituted
The pedotheque slot；The width of scour trough groove face is greater than wall distance at left and right sides of the width of pedotheque slot and pedotheque slot
Wall is equidistant at left and right sides of scour trough.
2. a kind of undisturbed soil impact resilience measurement device according to claim 1, which is characterized in that the sampling spoon is by four
Surface side wall surrounds the rectangular frame structure for the upper and lower side opening to be formed, wall and the upper side close to stable chute at left and right sides of sampling spoon
Vertically fold forms overlap joint overlap edge outward for the upper end of wall, and the scour trough groove bottom is located at wall at left and right sides of pedotheque slot
Neighbouring region and scour trough groove bottom be located at top adjacent sidewalls of the pedotheque slot close to stable chute region be equipped with
The step of the corresponding sinking of overlap edge, the sampling spoon are located in pedotheque slot, and the overlap edge of sampling spoon, which is buckled in, to be washed away
It is located at the upper surface of sampling spoon with scour trough groove bottom on the step that slot slot bottom sinks and by the setting of step convergence depth
Same plane.
3. a kind of undisturbed soil impact resilience measurement device according to claim 2, which is characterized in that in the overlap joint of sampling spoon
It is equipped with rubber sheet gasket between the step that side and scour trough slot bottom sink, prevents leak leakage husky；Step convergence depth is sampling spoon
Overlap edge thickness is with the sum of rubber sheet gasket thickness.
4. a kind of undisturbed soil impact resilience measurement device according to claim 2, which is characterized in that sampling spoon is close to current stabilization
The both ends of the overlap edge of slot and left and right sides overlap edge are connected as one to form right angle U-shaped structure overlap edge, scour trough slot bottom
The three sections of steps formed are connected as one to form right angle U-shaped structure step corresponding with right angle U-shaped structure overlap edge.
5. a kind of undisturbed soil impact resilience measurement device according to claim 2, which is characterized in that further include cutting ring handle, institute
Stating cutting ring handle is a rectangular groove structure put upside down, and notch is downward, and the rectangle size of the rectangular channel groove face is consistent with sampling spoon,
Cutting ring handle two sidewalls lower end is vertically turned down outward to form support edge corresponding with overlap edge at left and right sides of sampling spoon, institute
Support edge overlap edge cooperation corresponding with sampling spoon is stated, convenient for exerting oneself in original soil sampling process to cutting ring handle, ring will be sampled
Knife is inserted into undisturbed soil and undisturbed soil is avoided to be compacted.
6. a kind of undisturbed soil impact resilience measurement device according to claim 2, which is characterized in that pedotheque slot compared with
Low side is equipped with diversion trench, and the groove bottom of the diversion trench and the groove bottom of pedotheque slot are integrally formed to form and be located at same put down
Face, and the higher-end groove bottom of the diversion trench extended downwardly with scour trough groove bottom equivalent width and along gradient direction it is same
When become narrow gradually the diversion trench groove bottom to form trapezium structure；The diversion trench is close to the lower end of the top side wall of pedotheque slot
It is connect with diversion trench groove bottom, upper end is connected with corresponding scour trough groove bottom；Two cell wall of left and right of the diversion trench is by washing away
The spacing of two sidewalls gradually becomes smaller rear and diversion trench groove bottom corresponding sides while the two sidewalls of slot are extended downwardly along gradient direction
Connection is formed, so that the diversion trench notch formed is closing-in structure, the sampling tank is arranged below diversion trench notch.
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| CN201920241856.6U CN209525345U (en) | 2019-02-26 | 2019-02-26 | A kind of undisturbed soil impact resilience measurement device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111067374A (en) * | 2019-12-31 | 2020-04-28 | 广东美的厨房电器制造有限公司 | Cooking apparatus |
| CN112663589A (en) * | 2021-01-13 | 2021-04-16 | 南京工业大学 | Large-size sample sampling device for undisturbed soil at bottom of foundation pit and using method thereof |
-
2019
- 2019-02-26 CN CN201920241856.6U patent/CN209525345U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111067374A (en) * | 2019-12-31 | 2020-04-28 | 广东美的厨房电器制造有限公司 | Cooking apparatus |
| CN112663589A (en) * | 2021-01-13 | 2021-04-16 | 南京工业大学 | Large-size sample sampling device for undisturbed soil at bottom of foundation pit and using method thereof |
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