CN109211713A - A kind of anti-shelling property tester of precoated sand and its application method - Google Patents
A kind of anti-shelling property tester of precoated sand and its application method Download PDFInfo
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- CN109211713A CN109211713A CN201811229311.XA CN201811229311A CN109211713A CN 109211713 A CN109211713 A CN 109211713A CN 201811229311 A CN201811229311 A CN 201811229311A CN 109211713 A CN109211713 A CN 109211713A
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- 239000004576 sand Substances 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000002184 metal Substances 0.000 claims abstract description 80
- 229910052751 metal Inorganic materials 0.000 claims abstract description 80
- 238000012360 testing method Methods 0.000 claims abstract description 54
- 239000000945 filler Substances 0.000 claims description 17
- 230000008685 targeting Effects 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims description 4
- 238000013459 approach Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000010998 test method Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 7
- 230000007547 defect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Casting Devices For Molds (AREA)
Abstract
The invention belongs to shelling property test equipment technologies, and in particular to a kind of anti-shelling property tester of precoated sand and its application method, including, testing stand, with upper table surface and following table, the side of upper table surface offers opening；Test stand is set to overthe openings and is fixed on testing stand；Metal type, can be heated, and wear in metal type and be fixed with rotation axis, and the groove of perforation is provided among metal type, is equipped with mandril in groove；Sanding device, is set to the side of test stand and can turn to right above metal type sand sample is layed in metal type；Quantitative sand sample is spread to the metal type for being heated to certain temperature by sanding device, is measured the sample taking-up in metal type with mandril.The configuration of the present invention is simple, measuring speed is fast, and each data of different samples can intuitively react the anti-shelling implementations of precoated sand product, and test method is simple, and sand sample does not need to be pre-processed yet, and as a result accurately and reliably, requires operating environment and operation technique low.
Description
Technical field
The invention belongs to shelling property test equipment technologies, and in particular to a kind of anti-shelling property tester of precoated sand and its
Application method.
Background technique
In the performance of precoated sand, anti-shelling property is a wherein more important characteristic, the better precoated sand of anti-shelling property,
Its shell produced (core) quality stablizes durable, not cracky, shell easy to clean after casting, stable product quality, production effect
Rate is high, and defect rate is low.Shell core precoated sand is easy to produce shelling defect during making shell core sand core, is easy in casting process to produce
The defects of raw punching, will fight shelling property for the precoated sand that production development goes out new varieties and test, due to precoated sand field
More emerging industry is still belonged to, carries out the measurement of anti-shelling property, external detection device without very applicable equipment instantly
Structure is complicated, at high cost, and the operating environment and operation technique of equipment require height, and measurement result is not intuitive enough, is not suitable for vehicle
Between complex environment, now develop a kind of easy to use, test speed is fast, and the low anti-shelling tester of labor intensity was tested
Journey is simple, as a result accurate reliable.
Summary of the invention
The purpose of the present invention is there is the above problem in view of the prior art, propose that a kind of structure is simple, measuring speed
Fastly, the anti-shelling property tester of the accurate precoated sand of result.
Object of the invention can be realized by the following technical scheme: a kind of anti-shelling property tester of precoated sand, including, examination
Platform is tested, with upper table surface and following table, the side of the upper table surface offers opening；Test stand is set to overthe openings
And be fixed on testing stand, it is provided at the top of the test stand in the sand-falling port of opening face；Metal type can be heated, described
It is worn in metal type and is fixed with rotation axis, the both ends of the rotation axis are rotatably set on the test stand of sand-falling port two sides, described
It is provided with the groove of perforation among metal type, is equipped with mandril in the groove；Sanding device is set to the side of test stand simultaneously
It can turn to right above metal type and sand sample is layed in metal type；Quantitative sand sample spread by sanding device certain to being heated to
In the metal type of temperature, shakeout time and knockout quality are measured, is measured the sample taking-up in metal type with mandril.
In a kind of above-mentioned anti-shelling property tester of precoated sand, control cabinet, the control are provided on the testing stand
Power switch, display screen, timer, buzzer and the heater switch of control metal type heating are provided on case.
In a kind of above-mentioned anti-shelling property tester of precoated sand, the rotation axis both ends are provided with axle sleeve, the axle sleeve
It is fixed on test stand, the rotation axis is rotated along axle sleeve.
In a kind of above-mentioned anti-shelling property tester of precoated sand, the sanding device includes that lower end is fixed on test stand
Fixed link and the limit film being set in fixed link, the filler funnel for being placed on fixed link upper end, the limit film be provided with
It two panels and is fixed in fixed link, the filler funnel lateral surface, which is provided with, to be placed in fixed link and rotary installation
Set.
In a kind of above-mentioned anti-shelling property tester of precoated sand, the side of the metal type, which is provided with, to overturn metal type
180 ° of hand lever is provided on the test stand and a pair of is respectively used to the support hand lever supporting block different in overturning front-rear position.
In a kind of above-mentioned anti-shelling property tester of precoated sand, the groove is provided with table top, and the mandril upper end is set
It is equipped with the boss with table top cooperation, the mandril lower end is arranged with spring from metal type bottom surface direction, and the mandril lower end passes through gold
Type and spring section are connected with lever.
In a kind of above-mentioned anti-shelling property tester of precoated sand, the lever middle is provided with strut, and the strut is worn
And it can be along holder pivots in the bracket being fixed below testing stand.
In a kind of above-mentioned anti-shelling property tester of precoated sand, gradually purse up obliquely is provided with below the opening
Targeting port.
In a kind of above-mentioned anti-shelling property tester of precoated sand, electricity is provided on the following table immediately below the targeting port
Sub- scale and sample pan.
A kind of application method of the anti-shelling property tester of precoated sand, this approach includes the following steps,
S1: confirming that the groove of metal type is upward, open power supply, heater switch is opened, heat metal type to 250 DEG C ± 5 DEG C,
Constant temperature 10min；
S2: electronic scale power switch is opened, sample pan is placed on electronic scale；
S3: sand sample weighs 500g after stirring evenly, and filler funnel is turned to the surface of groove, sand sample is poured into and is filled out
It in funnel, flows out sand naturally, while touching timer and starting countdown 60s, after sand flows completely out, funnel is pushed back into original
Position；
Buzzer warning after S4:60s countdown closes buzzer, overturns 180 ° of metal type using hand lever, records sand sample
The amount of not sticking together in disk；
S5: pressing timer countdown 60s again, and observation sticks together whether sand falls, and record falls the time and falls weight
Amount；
It is flipped back to metal type after S6:60s countdown, presses down on lever mandril and sample is detached from and is pushed up with metal type
Out, the thickness and record at sample edge to central lug position 1/2 are measured；
S7: the residual sand on metal type surface is cleaned out.
The configuration of the present invention is simple, measuring speed is fast, and each data of different samples can intuitively react precoated sand product
Anti- shelling implementations, test method is simple, and sand sample does not need to be pre-processed yet, as a result accurately and reliably, to operating environment and
Operation technique requires low.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the anti-shelling property tester of precoated sand,
Fig. 2 is a kind of metal type Structure explosion diagram of the anti-shelling property tester of precoated sand.In figure, testing stand 100, upper table surface
110, opening 111, targeting port 112, control cabinet 113, following table 120, test stand 200, sand-falling port 210, metal type 300, rotation axis
310, axle sleeve 311, groove 320, table top 321, mandril 330, boss 331, spring 332, hand lever 340, supporting block 341, lever
350, strut 351, bracket 352, sanding device 400, fixed link 410, limit film 411, filler funnel 420, installation set 421, electricity
Sub- scale 500, sample pan 600.
Specific embodiment
Following is a specific embodiment of the present invention in conjunction with the accompanying drawings, technical scheme of the present invention will be further described,
However, the present invention is not limited to these examples.
As depicted in figs. 1 and 2, the anti-shelling property tester of a kind of precoated sand, including, testing stand 100, with upper table surface
110 and following table 120, the side of upper table surface 110 offer opening 111；Test stand 200 is set to above opening 111 and solid
Due on testing stand 100, be provided at the top of test stand 200 in be open 111 faces sand-falling port 210；Metal type 300 can be added
Heat wears in metal type 300 and is fixed with rotation axis 310, and the both ends of rotation axis 310 are rotatably set to the examination of 210 two sides of sand-falling port
It tests on frame 200, the groove 320 of perforation is provided among metal type 300, is equipped with mandril 330 in groove 320；Sanding device 400,
Sand sample is layed in metal type 300 by its side for being set to test stand 200 and can turning to right above metal type 300；By adding
Sand device 400 spreads quantitative sand sample to the metal type 300 for being heated to certain temperature, measures shakeout time and knockout quality, uses
Mandril 330 measures the sample taking-up in metal type 300.
Upper table surface 110 and following table 120 are vertically arranged, and place each test parts, the height of test stand 200 to support
Higher than the upper table surface 110 of testing stand 100, operator is suitably highly facilitated to carry out test operation, metal type 300 is set to test
On frame 200, extra sand sample drops into sand sample via opening 111 downwards from the gap between 300 side of metal type and sand-falling port 210
In disk 600, metal type 300 is set as the intermediate fixed cylinder for being equipped with rotation axis 310, is erected at test by rotation axis 310
On frame 200, stable structure can overturn metal type 300, and stable structure by rotation axis 310, facilitate operation, and metal type 300 heats
The precoated sand meeting curing molding on its surface, mandril 330 carry out sample cured in groove to push taking-up measurement upwards afterwards.
Preferably, it is provided with control cabinet 113 on testing stand 100, power switch, display screen, meter are provided on control cabinet 113
When device, buzzer and control metal type 300 heat heater switch.The setting of control cabinet 113, can will be electric in 100 side of testing stand
Road carries out covering protection, and each switch on panel, which facilitates, to be operated and observed, and heater switch is connected to metal type 300, can be to gold
Type 300 heat, start measurement preparatory function, display screen can set and observation experiment temperature and timing reading, convenient for record,
Buzzer can sound an alarm, and carry out the record or test operation of related data in time.
Preferably, 310 both ends of rotation axis are provided with axle sleeve 311, and axle sleeve 311 is fixed on test stand 200, rotation axis 310
It is rotated along axle sleeve 311.Rotation axis 310 passes through the center location of metal type 300, and overturning is by rotation axis 310 along 311 turns of axle sleeve
Dynamic, axle sleeve 311 is integrally formed and the flat configuration at both ends is fixed on test stand 200, stable structure.
Preferably, sanding device 400 includes the fixed link 410 and be set to fixed link that lower end is fixed on test stand 200
Limit film 411 on 410, the filler funnel 420 for being placed on 410 upper end of fixed link, limit film 411 are provided with two panels and are fixed on
In fixed link 410,420 lateral surface of filler funnel, which is provided with, to be placed in fixed link 410 and rotary installation set 421.It fills out
Funnel 420 along fixed link 410 rotate, turn to against side limit film 411 when, the discharging gate of filler funnel 420
320 top of groove is faced, filler position is accurate, when turned to after filler against other side limit film 411, filler funnel
420 produce test stand 200 completely, do not influence the space of the overturning of metal type 300, and compact overall structure is reasonable, save space, while not
Influence test operation.
It is further preferred that the side of metal type 300, which is provided with, to overturn 180 ° of hand lever 340, test stand for metal type 300
It is provided with a pair of support hand lever 340 that is respectively used on 200 and is overturning the different supporting block 341 of front-rear position.Hand lever 340 is set to
The middle part of 300 side of metal type, hand lever 340 and rotation axis 310 are in 90 ° of settings, stress balance when overturning, operating process stabilization side
Just, the supporting block 341 of two sides may be used to support hand lever 340 before and after overturning, and supporting block 341 is set as triangle, push up
Portion's hand lever 340, stable structure, hand lever 340 have heavier quality, can all make 300 holding of metal type horizontal before and after overturning.
In a kind of above-mentioned anti-shelling property tester of precoated sand, groove 320 is provided with table top 321, and 330 upper end of mandril is set
It is equipped with the boss 331 cooperated with table top 321,330 lower end of mandril is arranged with spring 332, mandril 330 from 300 bottom surface direction of metal type
Lower end passes through metal type 300 and 332 part of spring is connected with lever 350.Table top is arranged in the groove side, and the through-hole among table top can
It is passed through with accommodating mandril lower end, up, mandril 330 is penetrated from top to bottom for the groove 320 equipped with table top 321, and boss 331 blocks
It closes and forms the closed groove 320 in bottom on the table top 321 in groove 320, after sand sample is fallen on groove 320, in 300 table of metal type
Face solidification, ejection can take out cured sample mandril 330 upwards, and spring 332 drives mandril 330 to reset, easy to operate letter
Single, sample takes out completely, and measurement structure is accurate.
It is further preferred that being provided with strut 351 in the middle part of lever 350, strut 351, which is arranged in, to be fixed under testing stand 100
It can rotate in the bracket 352 of side and along bracket 352.Lever 350 and strut 351 are vertical setting, when upper and lower shifting lever 350
Strut 351 is rotated along bracket 352, and the outwardly extending one end of lever 350 is pushed, and is just lifted upwards with 330 connecting pin of mandril, from
And cured sample can be ejected the groove 320 of metal type 300 by the boss 331 of 330 upper end of mandril, sample is complete, facilitates survey
Amount, under spring 332 acts on, lever 350 and mandril 330 automatically reset, easy to operate.
Preferably, 111 lower section of opening is provided with the targeting port 112 of gradually purse up obliquely.Extra sand sample is from opening
Continue along targeting port 112 toward whereabouts at 111, the targeting port 112 collapsed downwards can prevent sand sample from splashing, and claim convenient for collecting
Weight.
Preferably, electronic scale 500 and sample pan 600 are provided on the following table 120 immediately below targeting port 112.Sand sample
Dropped into sample pan 600 along targeting port 112, electronic scale 500 can read the amount of not sticking together, etc. after metal type 300 overturn, can be with
Knockout amount is read, simple and convenient, reading speed is fast, and error is small.
A kind of application method of the anti-shelling property tester of precoated sand, this approach includes the following steps,
S1: confirming that the groove of metal type is upward, open power supply, heater switch is opened, heat metal type to 250 DEG C ± 5 DEG C,
Constant temperature 10min；
S2: electronic scale power switch is opened, sample pan is placed on electronic scale；
S3: sand sample weighs 500g after stirring evenly, and filler funnel is turned to the surface of groove, sand sample is poured into and is filled out
It in funnel, flows out sand naturally, while touching timer and starting countdown 60s, after sand flows completely out, funnel is pushed back into original
Position；
Buzzer warning after S4:60s countdown closes buzzer, overturns 180 ° of metal type using hand lever, records sand sample
The amount of not sticking together in disk；
S5: pressing timer countdown 60s again, and observation sticks together whether sand falls, and record falls the time and falls weight
Amount；
It is flipped back to metal type after S6:60s countdown, presses down on lever mandril and sample is detached from and is pushed up with metal type
Out, the thickness and record at sample edge to central lug position 1/2 are measured；
S7: the residual sand on metal type surface is cleaned out.
Below according to above embodiments, the working principle and process of a kind of anti-shelling property tester of precoated sand are described.
It can be used for placing burnisher, such as small scoop and hairbrush in 111 sides that are open on upper table surface 110, survey every time
Remaining sand sample is cleared up after amount, opens heater switch, constant temperature 10min after metal type is heated to 250 DEG C ± 5 DEG C, by filler funnel
The groove for turning to outlet face metal type weighs the sand sample that 500g is stirred evenly and inserts in metal type from filler funnel, hand is used after 60s
Bar overturns 180 ° of metal type, and extra sand sample drops into sample pan, directly reads that the amount of not sticking together is simultaneously from the display screen on electronic scale
It records, observes and record sample sand falling the time and falling weight in timing 60s, be flipped back to by metal type after 60s, will be pushed up with lever
Bar completely ejects cured sand sample out of groove upwards, measures thickness and record at its edge to central lug position 1/2.
The present invention carries out the anti-shelling test of precoated sand, and heterogeneity and manufacturing process influence sand sample in experiment and show
The performance data come, the measurement method sand sample do not need to be pre-processed, and measure convenient and efficient, the measurement data pair of different samples
More obvious than difference, the structure of tester is simple, stablizes practical, and measurement result is fast, and equipment cost is low, and maintenance and cleaning is convenient, to behaviour
Make environment and operation technique requirement is low, it is practical.
Specific embodiment described herein is only an example for the spirit of the invention.The neck of technology belonging to the present invention
The technical staff in domain can make various modifications or additions to the described embodiments or replace by a similar method
In generation, however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.
Claims (10)
1. a kind of anti-shelling property tester of precoated sand characterized by comprising
Testing stand, with upper table surface and following table, the side of the upper table surface offers opening；
Test stand is set to overthe openings and is fixed on testing stand, is provided at the top of the test stand in opening face
Sand-falling port；
Metal type can be heated, and worn in the metal type and be fixed with rotation axis, and the both ends of the rotation axis, which are rotatably set to, to be fallen
On the test stand of the two sides Sha Kou, it is provided with the groove of perforation among the metal type, is equipped with mandril in the groove；
Sanding device, is set to the side of test stand and can turn to right above metal type sand sample is layed in metal type；
Quantitative sand sample is spread to the metal type for being heated to certain temperature by sanding device, measures shakeout time and knockout matter
Amount is measured the sample taking-up in metal type with mandril.
2. the anti-shelling property tester of a kind of precoated sand according to claim 1, which is characterized in that be arranged on the testing stand
There is control cabinet, power switch, display screen, timer, buzzer and the heating of control metal type heating are provided on the control cabinet
Switch.
3. the anti-shelling property tester of a kind of precoated sand according to claim 1, which is characterized in that the rotation axis both ends are set
It is equipped with axle sleeve, the axle sleeve is fixed on test stand, and the rotation axis is rotated along axle sleeve.
4. the anti-shelling property tester of a kind of precoated sand according to claim 1, which is characterized in that the sanding device includes
The fixed link that lower end is fixed on test stand and the limit film being set in fixed link, the filler leakage for being placed on fixed link upper end
Bucket, the limit film are provided with two panels and are fixed in fixed link, and the filler funnel lateral surface, which is provided with, is placed on fixed link
Upper and rotary installation set.
5. the anti-shelling property tester of a kind of precoated sand according to claim 1, which is characterized in that the side of the metal type is set
Metal type can be overturn 180 ° of hand lever by being equipped with, and a pair is provided on the test stand and is respectively used to support hand lever in overturning anteroposterior position
Set different supporting blocks.
6. the anti-shelling property tester of a kind of precoated sand according to claim 1, which is characterized in that the groove is provided with platform
Face, the mandril upper end are provided with the boss with table top cooperation, and the mandril lower end is arranged with spring from metal type bottom surface direction, institute
It states mandril lower end and is connected with lever across metal type and spring section.
7. the anti-shelling property tester of a kind of precoated sand according to claim 6, which is characterized in that the lever middle setting
There is strut, the strut is arranged in the bracket being fixed below testing stand and can be along holder pivots.
8. the anti-shelling property tester of a kind of precoated sand according to claim 1, which is characterized in that setting below the opening
There is the targeting port of gradually purse up obliquely.
9. the anti-shelling property tester of a kind of precoated sand according to claim 8, which is characterized in that immediately below the targeting port
Following table on be provided with electronic scale and sample pan.
10. a kind of application method of the anti-shelling property tester of precoated sand, this approach includes the following steps,
S1: confirming that the groove of metal type is upward, opens power supply, heater switch is opened, and heats metal type to 250 DEG C ± 5 DEG C, in constant temperature
10min；
S2: electronic scale power switch is opened, sample pan is placed on electronic scale；
S3: sand sample weighs 500g after stirring evenly, and filler funnel is turned to the surface of groove, and sand sample is poured into filler leakage
It in bucket, flows out sand naturally, while touching timer and starting countdown 60s, after sand flows completely out, by funnel pushed home；
Buzzer warning after S4:60s countdown closes buzzer, overturns 180 ° of metal type using hand lever, records in sample pan
The amount of not sticking together；
S5: pressing timer countdown 60s again, and observation sticks together whether sand falls, and record falls the time and falls weight；
It is flipped back to metal type after S6:60s countdown, presses down on lever mandril and sample is detached from and is ejected with metal type, measure
The thickness and record materialsed at edge to central lug position 1/2；
S7: the residual sand on metal type surface is cleaned out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811229311.XA CN109211713B (en) | 2018-10-22 | 2018-10-22 | Precoated sand shelling resistance tester and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811229311.XA CN109211713B (en) | 2018-10-22 | 2018-10-22 | Precoated sand shelling resistance tester and use method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109211713A true CN109211713A (en) | 2019-01-15 |
| CN109211713B CN109211713B (en) | 2024-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811229311.XA Active CN109211713B (en) | 2018-10-22 | 2018-10-22 | Precoated sand shelling resistance tester and use method thereof |
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|---|---|---|---|---|
| GB1159952A (en) * | 1965-05-21 | 1969-07-30 | Nat Res Dev | Process and Apparatus for Testing Foundry Sand |
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2018
- 2018-10-22 CN CN201811229311.XA patent/CN109211713B/en active Active
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|---|---|---|---|---|
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| CN207991985U (en) * | 2018-04-09 | 2018-10-19 | 盐城仁创砂业科技有限公司 | A kind of apparatus and system measuring precoated sand shelling property |
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| Title |
|---|
| SHANG-LIEN LO ET AL: "Characteristics and adsorption properties of iron-coated sand", WAT. SCI. TECH, vol. 35, no. 7, pages 674 - 675 * |
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| Publication number | Publication date |
|---|---|
| CN109211713B (en) | 2024-01-16 |
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