CN110449358A - A kind of quick Sand screen of Municipal Engineering Construction - Google Patents
A kind of quick Sand screen of Municipal Engineering Construction Download PDFInfo
- Publication number
- CN110449358A CN110449358A CN201910661774.1A CN201910661774A CN110449358A CN 110449358 A CN110449358 A CN 110449358A CN 201910661774 A CN201910661774 A CN 201910661774A CN 110449358 A CN110449358 A CN 110449358A
- Authority
- CN
- China
- Prior art keywords
- sieve plate
- cylinder
- sand
- fixed frame
- engineering construction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/22—Crushing mills with screw-shaped crushing means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
- B07B1/36—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens jigging or moving to-and-fro in more than one direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
The invention discloses a kind of quick Sand screens of Municipal Engineering Construction, it is related to municipal works technical field, including fixed frame, cylinder is hinged on fixed frame, bottom of cylinder, which is embedded, is equipped with the first sieve plate, is equipped at the top of the first sieve plate into Sha Dou, is fixedly installed with undersetting and upper bracket respectively on cylinder and fixed frame, support rod I and support rod II right end are hinged with the pole being drivingly connected by reciprocator jointly, and the second sieve plate is sequentially connected by reciprocator；The helical axis rotation that the present invention is arranged realizes that carrying out adequately rotation to the sand of cylinder interior breaks up effect, avoid the agglomeration of sand during sieving husky, improve the loosening degree of sand, improve mobility, guarantee the efficient of subsequent sieve sand, drives the vibration-type that cylinder can be achieved to swing by the reciprocator of setting, promote the first sieve plate to the screening efficiency of sand, energy vertical tremor, further ensures the high efficiency screening of sand while the second sieve plate moves back and forth simultaneously.
Description
Technical field
The present invention relates to municipal works technical field, specifically a kind of quick Sand screen of Municipal Engineering Construction.
Background technique
In China, urban operating mechanism, which refers to, to be arranged within the scope of metropolitan district, town planning construction, is based on government responsibility and obligation
Resident provides various buildings, structures, equipment of paid or free public product and service etc..Urban life is matched various
Public infrastructure development belongs to municipal works scope, such as common urban road, bridge, subway, such as tight with life
Close relevant various pipelines: rainwater, sewage, upper water, middle water, electric power, telecommunications, heating power, combustion gas etc., there are also square, urban afforestation
Deng construction, belong to municipal works scope.
In civic building construction, in order to meet construction requirement, need to sieve the sand of construction material, to obtain
More fine and smooth sand, but current Sand screen is using in engineering, sand be easy to cause excessive aggregation or even blocking,
It is more difficult to lead to sieve husky operation, directly constrains the husky quality of sieve, for this purpose, now providing a kind of Municipal Engineering Construction quickly sieves sand
Device, to solve the above technical problems.
Summary of the invention
The purpose of the present invention is to provide a kind of quick Sand screens of Municipal Engineering Construction, to solve in above-mentioned background technique
The problem of proposition.
To achieve the above object, the invention provides the following technical scheme:
A kind of quick Sand screen of Municipal Engineering Construction, including fixed frame are hinged with cylinder on fixed frame, and bottom of cylinder is embedded peace
It is equipped with equipped with the first sieve plate, at the top of the first sieve plate into Sha Dou, rotary type is equipped with the company driven by driving motor II in cylinder
Connect frame, on connection frame pivot joint there are two helical axis disposed in parallel, be fixedly installed with respectively on cylinder and fixed frame undersetting and
Support rod I and support rod II, the support rod I and support rod II right end have been respectively articulated on upper bracket, undersetting and upper bracket
It is hinged with the pole being drivingly connected by reciprocator jointly, is equipped with second positioned at the first sieve plate bottom on the fixed frame
Sieve plate, the second sieve plate are sequentially connected by reciprocator, mesh diameter of the second sieve plate mesh diameter less than the first sieve plate.
As an improvement of the present invention: the cylinder inner sidewall circumferential direction is fixed with ring gear, on two helical axis
Coaxially it is fixed with the transmission gear that connection is engaged with ring gear.
As an improvement of the present invention: the reciprocator includes the partial gear of rotation setting, not exclusively
Engagement is connected with the upper rack being fixedly connected with pole on gear, and vibration spring is fixedly connected between undersetting and upper bracket.
As an improvement of the present invention: level is fixedly installed with guide rod, sliding sleeve on guide rod on the fixed frame
Equipped with the sliding sleeve being fixedly connected with pole, upper rack is fixedly connected with sliding sleeve.
As an improvement of the present invention: being fixed with and engaged with partial gear under connection on second sieve plate
Rack gear is horizontally fixed with the limit cage plate being slidably connected with the second sieve plate in fixed frame, solid between the second sieve plate and limit cage plate
Surely it is connected with lateral reset spring.
As an improvement of the present invention: the fixed frame bottom is fixedly installed with spacing collar, limit sleeve vertically
It is slidably fitted with abutting bar in cylinder, abuts and is fixed with limit spring between bar and spacing collar, the second sieve plate bottom is uniformly fixed
Be equipped with several with abut bar abutting drive lugs.
As an improvement of the present invention: driving motor I, the output of driving motor I are fixed on the fixed frame
Axis is sequentially connected by pulley mechanism and partial gear.
Compared with prior art, the beneficial effects of the present invention are:
The helical axis rotation that the present invention is arranged realizes that carrying out adequately rotation to the sand of cylinder interior breaks up effect, avoids sieving
The agglomeration of sand during sand, improves the loosening degree of sand, improves mobility, guarantees the efficient of subsequent sieve sand, leads to
The reciprocator for crossing setting drives the vibration-type that cylinder can be achieved to swing, and promotes the first sieve plate to the screening efficiency of sand, together
When the second sieve plate while move back and forth can vertical tremor, further ensure the high efficiency screening of sand.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is dedusting rack schematic diagram of internal structure in the present invention；
Fig. 3 is the connection schematic side view of ring gear and transmission gear in the present invention.
In figure: 1- fixed frame, 2- transverse direction reset spring, 3- limit cage plate, the second sieve plate of 4-, 5- driving motor I, 6- belt
Take turns rack gear, 8- partial gear, 9- upper rack, 10- guide rod, 11- sliding sleeve, 12- pole, 13- support rod I, 14- under mechanism, 7-
Support rod II, 15- undersetting, 16- vibration spring, 17- upper bracket, 18- transmission gear, 19- ring gear, 20- are into Sha Dou, 21-
Helical axis, 22- cylinder, 23- connection frame, the first sieve plate of 24- driving motor II, 25-, 26- abut bar, 27- drive lugs, 28-
Limit spring, 29- spacing collar.
Specific embodiment
The technical solution of the patent is explained in further detail With reference to embodiment:
Embodiment 1
Fig. 1-3, a kind of quick Sand screen of Municipal Engineering Construction, including fixed frame 1 are please referred to, is hinged with cylinder on fixed frame 1
22,22 bottom of cylinder, which is embedded, is equipped with the first sieve plate 25, is equipped at the top of the first sieve plate 25 into sand bucket 20, by 20 can into sand bucket
The sand sieved is injected inside to cylinder 22, the first sieve plate 25 being arranged in cylinder 22 sieves sand for the first time
Effect.Rotary type is equipped with the connection frame 23 driven by driving motor II24 in cylinder 22, and there are two flat for pivot joint on connection frame 23
The helical axis 21 of row setting, the rotation of connection frame 23 can drive helical axis 21 to rotate, and 22 inside sand of cylinder is stirred in realization
Effect improves the loosening degree and mobility of sand, promotes screening effect.
Undersetting 15 and upper bracket 17, undersetting 15 and upper bracket 17 are fixedly installed on cylinder 22 and fixed frame 1 respectively
On be respectively articulated with support rod I13 and support rod II14, the support rod I13 and support rod II14 right end is hinged with jointly and passes through
The pole 12 that reciprocator is drivingly connected.Reciprocator includes the partial gear 8 of rotation setting, is engaged on partial gear 8
It is connected with the upper rack 9 being fixedly connected with pole 12, vibration spring 16 is fixedly connected between undersetting 15 and upper bracket 17.
12 traverse motion of pole is driven by reciprocator, pole 12 drives support rod I13 and support rod II14 to exist
It shakes under the elastic reaction of spring 16 towards or away from movement, realizes the vibrating effect of cylinder 22, and then promote the first sieve plate
The screening rate of 25 pairs of sands.
The second sieve plate 4 positioned at 25 bottom of the first sieve plate is installed, the second sieve plate 4 is passed by reciprocator on fixed frame 1
Dynamic connection, reciprocator carry out reciprocating driving to the second sieve plate 4, and the second sieve plate 4 carries out second to sand and sieves, and second
4 mesh diameter of sieve plate less than the first sieve plate 25 mesh diameter, the second sieve plate 4 screening sand it is more fine and smooth.
In addition, 22 inner sidewall circumferential direction of cylinder is fixed with ring gear 19, coaxially it is fixed on two helical axis 21 and internal tooth
The transmission gear 18 of 19 engagement connection of circle.The rotation of connection frame 23 drives helical axis 21 to turn around the output shaft of driving motor II24
It is dynamic, and the transmission gear 18 on helical axis 21 is engaged with the transmission of ring gear 19 at the same time, realizes the rotation of helical axis 21, in turn
Realization is fully rotatable dispersion effect to 22 inside sand of cylinder, substantially increases the loosening degree of sand, avoids agglomerating,
Improve screening efficiency.
Embodiment 2
On the basis of embodiment 1, in addition, level is fixedly installed with guide rod 10 on fixed frame 1, on guide rod 10 sliding sleeve be equipped with
The sliding sleeve 11 that pole 12 is fixedly connected, upper rack 9 are fixedly connected with sliding sleeve 11.9 interval of rotation and upper rack of partial gear 8
Engagement, when being moved to the left under engagement of the upper rack 9 in partial gear 8, the angle of support rod I13 and support rod II14
Increasing, cylinder 22 is lifted, when upper rack 9 is separated with partial gear 8, under the gravity of cylinder 22, support rod
The angle of I13 and support rod II14 reduce, and cylinder 22 moves down, and realize the vertical tremor of cylinder 22 repeatedly, promote
The screening of sand.
Driving motor I5 is fixed on fixed frame 1, the output shaft of driving motor I5 passes through pulley mechanism 6 and incomplete tooth
8 transmission connection of wheel, driving motor I5 are driven partial gear 8 by pulley mechanism 6, are fixed on the second sieve plate 4
The lower rack gear 7 of connection is engaged with partial gear 8, is horizontally fixed with the limit sleeve being slidably connected with the second sieve plate 4 in fixed frame 1
Plate 3 is fixedly connected with lateral reset spring 2 between second sieve plate 4 and limit cage plate 3.
The rotation interval of partial gear 8 engages connection with lower rack gear 7, under the elastic reaction of lateral reset spring 2, the
Two sieve plates, 4 realization effect moves back and forth, and then accelerates the screening efficiency of sand thereon.And it is solid vertically in 1 bottom of fixed frame
Dingan County is equipped with spacing collar 29, is slidably fitted in spacing collar 29 and abuts bar 26, abuts solid between bar 26 and spacing collar 29
Surely have a limit spring 28,4 bottom of the second sieve plate be uniformly fixedly installed with several with abut the drive lugs 27 of the abutting of bar 26.
During the vibration of 4 transverse reciprocating of the second sieve plate, the drive lugs 27 of 4 bottom of the second sieve plate rub with bar 26 is abutted
It wipes and abuts transmission, abut bar 26 and moved back and forth up and down under the elastic reaction of limit spring 28 along spacing collar 29, realization pair
The percussion repeatedly of second sieve plate 4 acts on, and realizes the vertical tremor of the second sieve plate 4, promotes the screening effect to sand.
In conclusion the rotation of helical axis 21 that the present invention is arranged is realized and is adequately rotated to the sand inside cylinder 22
Effect is broken up, the agglomeration of sand during sieving husky is avoided, improves the loosening degree of sand, mobility is improved, after guarantee
Continuous sieves the efficient of sand, drives the vibration-type that cylinder 22 can be achieved to swing by the reciprocator of setting, promotes the first sieve plate
The screening efficiency of 25 pairs of sands, at the same while the second sieve plate 4 moves back and forth can vertical tremor, further ensure sand
High efficiency screening.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.
It should be strongly noted that although this specification is described in terms of embodiments, but not each embodiment
It only contains an independent technical solution, this description of the specification is merely for the sake of clarity, those skilled in the art
It should consider the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms art technology
The other embodiments that personnel are understood that, the preferred embodiment of the technical program above described embodiment only expresses,
Describe more specific and detailed, but it cannot be understood as the limitations to the technical program the scope of the patents.It should be understood that
It is that for those of ordinary skill in the art, without departing from the inventive concept of the premise, several changes can also be made
Shape, improvement and substitution, these belong to the protection scope of the technical program.Therefore, the protection scope of the technical program patent is answered
It is determined by the appended claims.
Claims (7)
1. a kind of quick Sand screen of Municipal Engineering Construction, including fixed frame (1), it is hinged with cylinder (22) on fixed frame (1), circle
Cylinder (22) bottom, which is embedded, to be equipped with the first sieve plate (25), is equipped at the top of the first sieve plate (25) into Sha Dou (20), which is characterized in that
The interior rotary type of the cylinder (22) is equipped with the connection frame (23) by driving motor II(24) driving, and connection frame is articulated on (23)
Two helical axis (21) disposed in parallel are fixedly installed with undersetting (15) He Shangzhi on cylinder (22) and fixed frame (1) respectively
Seat (17) has been respectively articulated with support rod I(13 on undersetting (15) and upper bracket (17)) and support rod II(14), the support rod
I(13) and support rod II(14) right end be hinged with jointly by reciprocator be drivingly connected pole (12), the fixed frame (1)
On the second sieve plate (4) positioned at the first sieve plate (25) bottom is installed, the second sieve plate (4) is sequentially connected by reciprocator, the
Mesh diameter of two sieve plates (4) mesh diameter less than the first sieve plate (25).
2. the quick Sand screen of Municipal Engineering Construction according to claim 1, which is characterized in that on the inside of the cylinder (22)
Wall circumferential direction is fixed with ring gear (19), and the transmission that connection is engaged with ring gear (19) is coaxially fixed on two helical axis (21)
Gear (18).
3. the quick Sand screen of Municipal Engineering Construction according to claim 1, which is characterized in that the reciprocator includes
The partial gear (8) of setting is rotated, engagement is connected with the upper rack being fixedly connected with pole (12) on partial gear (8)
(9), vibration spring (16) is fixedly connected between undersetting (15) and upper bracket (17).
4. the quick Sand screen of Municipal Engineering Construction according to claim 3, which is characterized in that on the fixed frame (1)
Level is fixedly installed with guide rod (10), and sliding sleeve is equipped with the sliding sleeve (11) being fixedly connected with pole (12), upper tooth on guide rod (10)
Item (9) is fixedly connected with sliding sleeve (11).
5. the quick Sand screen of Municipal Engineering Construction according to claim 3, which is characterized in that second sieve plate (4)
On be fixed with the lower rack gear (7) that connection is engaged with partial gear (8), is horizontally fixed with and the second sieve plate (4) in fixed frame (1)
The limit cage plate (3) being slidably connected is fixedly connected with lateral reset spring (2) between the second sieve plate (4) and limit cage plate (3).
6. the quick Sand screen of Municipal Engineering Construction according to claim 1, which is characterized in that fixed frame (1) bottom
Portion is fixedly installed with spacing collar (29) vertically, is slidably fitted in spacing collar (29) and is abutted bar (26), abut bar (26) with
Be fixed between spacing collar (29) limit spring (28), the second sieve plate (4) bottom be uniformly fixedly installed with several with abut
The drive lugs (27) that bar (26) abuts.
7. the quick Sand screen of Municipal Engineering Construction according to claim 3, which is characterized in that on the fixed frame (1)
Be fixed with driving motor I(5), driving motor I(5) output shaft by pulley mechanism (6) and partial gear (8) transmission connect
It connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910661774.1A CN110449358A (en) | 2019-07-22 | 2019-07-22 | A kind of quick Sand screen of Municipal Engineering Construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910661774.1A CN110449358A (en) | 2019-07-22 | 2019-07-22 | A kind of quick Sand screen of Municipal Engineering Construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110449358A true CN110449358A (en) | 2019-11-15 |
Family
ID=68481674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910661774.1A Withdrawn CN110449358A (en) | 2019-07-22 | 2019-07-22 | A kind of quick Sand screen of Municipal Engineering Construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110449358A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112024398A (en) * | 2020-08-05 | 2020-12-04 | 程诗栋 | Building grit screening equipment |
| CN112295701A (en) * | 2020-09-15 | 2021-02-02 | 罗美婷 | Intelligent rare earth batch grinding equipment |
| CN112474277A (en) * | 2020-11-10 | 2021-03-12 | 湖南洞庭春米业有限公司 | Impurity screening plant is used in grain oil processing |
| CN112974227A (en) * | 2021-03-11 | 2021-06-18 | 陕西省动物研究所 | A processingequipment for fish feed production |
| CN113877813A (en) * | 2021-11-18 | 2022-01-04 | 江西宏巍建筑工程有限公司 | Municipal works are with high-efficient screening sand device |
| CN114212798A (en) * | 2021-12-26 | 2022-03-22 | 江苏中腾石英材料科技股份有限公司 | High-purity superfine spherical quartz powder and preparation method and special equipment thereof |
| CN114950952A (en) * | 2022-07-27 | 2022-08-30 | 中集绿建环保新材料(连云港)有限公司 | Building regeneration aggregate vibration winnowing equipment |
| CN115055250A (en) * | 2022-07-29 | 2022-09-16 | 穆福长 | Soil remediation preprocessing device |
-
2019
- 2019-07-22 CN CN201910661774.1A patent/CN110449358A/en not_active Withdrawn
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112024398A (en) * | 2020-08-05 | 2020-12-04 | 程诗栋 | Building grit screening equipment |
| CN112295701A (en) * | 2020-09-15 | 2021-02-02 | 罗美婷 | Intelligent rare earth batch grinding equipment |
| CN112295701B (en) * | 2020-09-15 | 2022-07-05 | 董贵兴 | Intelligent rare earth batch grinding equipment |
| CN112474277A (en) * | 2020-11-10 | 2021-03-12 | 湖南洞庭春米业有限公司 | Impurity screening plant is used in grain oil processing |
| CN112974227A (en) * | 2021-03-11 | 2021-06-18 | 陕西省动物研究所 | A processingequipment for fish feed production |
| CN113877813A (en) * | 2021-11-18 | 2022-01-04 | 江西宏巍建筑工程有限公司 | Municipal works are with high-efficient screening sand device |
| CN114212798A (en) * | 2021-12-26 | 2022-03-22 | 江苏中腾石英材料科技股份有限公司 | High-purity superfine spherical quartz powder and preparation method and special equipment thereof |
| CN114950952A (en) * | 2022-07-27 | 2022-08-30 | 中集绿建环保新材料(连云港)有限公司 | Building regeneration aggregate vibration winnowing equipment |
| CN115055250A (en) * | 2022-07-29 | 2022-09-16 | 穆福长 | Soil remediation preprocessing device |
| CN115055250B (en) * | 2022-07-29 | 2024-05-24 | 长三角(义乌)生态环境研究中心 | Soil restoration preprocessing device |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20191115 |