CN108466361A - A kind of efficient concrete mixer - Google Patents
A kind of efficient concrete mixer Download PDFInfo
- Publication number
- CN108466361A CN108466361A CN201810107118.2A CN201810107118A CN108466361A CN 108466361 A CN108466361 A CN 108466361A CN 201810107118 A CN201810107118 A CN 201810107118A CN 108466361 A CN108466361 A CN 108466361A
- Authority
- CN
- China
- Prior art keywords
- agitator tank
- fixedly connected
- rolling
- axis
- bearing
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/0875—Mixing in separate stages involving different containers for each stage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/0806—Details; Accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/0806—Details; Accessories
- B28C5/0818—Charging or discharging gates or chutes; Sealing means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/10—Mixing in containers not actuated to effect the mixing
- B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
- B28C5/14—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers the stirrers having motion about a horizontal or substantially horizontal axis
- B28C5/142—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers the stirrers having motion about a horizontal or substantially horizontal axis the stirrer shaft carrying screw-blades
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/10—Mixing in containers not actuated to effect the mixing
- B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
- B28C5/16—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers the stirrers having motion about a vertical or steeply inclined axis
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The invention discloses a kind of efficient concrete mixers, including the first agitator tank, the top of first agitator tank left side offers feed inlet, the upper surface of first agitator tank is fixed and is inlaid with first bearing, the upper surface of first agitator tank is fixedly connected with first motor, the output end of first motor is fixedly connected with first axis of rolling, and the one end of first axis of rolling far from first motor runs through first bearing and extends to the inside of the first agitator tank.The efficient concrete mixer is used cooperatively feed inlet by being provided with feed hopper, the charging of the first agitator tank can be made more convenient, by by being provided with second axis of rolling, being used cooperatively agitating plate, the device can be made to carry out secondary agitation, it ensure that device material discharge is more convenient, by being provided with fourth bearing, it is used cooperatively 3rd bearing, the rotation of second axis of rolling can be made more to stablize, the normal use of people is effectively ensured, by the popularization conducive to market.
Description
Technical field
The present invention relates to blender technical field, specially a kind of efficient concrete mixer.
Background technology
Heavy-duty machinery is often referred to heavy engineering machinery, and heavy-duty machinery refers generally to, derrick crane, static pile press and coagulation
Native blender etc., concrete mixer are a kind of constructional engineering machineries, master be for mixing cement, sandstone and all kinds of dry powder and mortars
Equal construction materials, this is that a kind of blade-carrying axis rotates in cylinder or slot, and plurality of raw materials is stirred mixing, is allowed into
A kind of machine for mixture or suitable for consistency, blender is divided into a lot of kinds, there is forced mixer, single horizontal shaft mixer, double
Horizontal shaft blender etc..
It is poor poor with discharging effect often to there is mixing effect during this used for existing concrete blender
Problem has seriously affected the normal use of people, is unfavorable for the popularization in market.
Invention content
（One）The technical issues of solution
In view of the deficiencies of the prior art, it the present invention provides a kind of efficient concrete mixer, solves existing concrete and stirs
Mix the problem that machine mixing effect is poor and discharging effect is poor.
（Two）Technical solution
To achieve the above object, the present invention provides the following technical solutions：A kind of efficient concrete mixer, including the first stirring
Case, the top of first agitator tank left side offer feed inlet, and the upper surface of first agitator tank, which is fixed, is inlaid with the
The upper surface of one bearing, first agitator tank is fixedly connected with first motor, and the output end of the first motor is fixedly connected
There is first axis of rolling, the described one end of first axis of rolling far from first motor is through first bearing and extends to the first agitator tank
Inside, and the outer surface of first axis of rolling is fixedly connected with the inner ring of first bearing, the outer surface of first axis of rolling is fixed
It is connected with stirring rod, the second agitator tank, the lower part of first agitator tank right side are placed on the right side of first agitator tank
Fixation is communicated with pipeline.
The one end of the pipeline far from the first agitator tank is fixed with the top of the second agitator tank left side and is connected to, and described second
The right side of agitator tank, which is fixed, is inlaid with 3rd bearing, and the inside of second agitator tank is placed with second axis of rolling, and described the
The right end of two axis of rolling runs through 3rd bearing and extends to the outside of the second agitator tank, and the outer surface of second axis of rolling and third
The inner ring of bearing is fixedly connected, and the outer surface of second axis of rolling is fixedly connected with spiral agitating plate, and described second
The outer surface of axis of rolling right end is fixedly connected with the second coupled wheel, and the upper surface of second agitator tank is fixedly connected with the second electricity
The output end of machine, second motor is fixedly connected with the third axis of rolling, and the outer surface of the third axis of rolling is fixedly connected with
First coupled wheel, first coupled wheel are sequentially connected with the second coupled wheel by transmission belt, second agitator tank right side
Lower part be fixedly connected with discharge nozzle.
Preferably, the inner bottom wall of first agitator tank is fixedly connected with slide plate compatible with the first agitator tank, described
The upper surface of slide plate, which is fixed, is inlaid with second bearing, and the outer surface of the inner ring of second bearing and the first axis of rolling bottom end is fixed and connected
It connects.
Preferably, the madial wall fixation of second agitator tank is inlaid with fourth bearing, the inner ring of the fourth bearing with
The outer surface of second axis of rolling left end is fixedly connected.
Preferably, the bottom surface of second agitator tank is fixedly connected with bottom plate, and the bottom surface of the bottom plate is fixedly connected with rubber
Rubber cushion.
Preferably, the bottom surface of first agitator tank is fixedly connected with pedestal, the bottom surface of the pedestal and the upper table of bottom plate
Face is fixedly connected.
Preferably, the left side of first agitator tank is fixedly connected with feed hopper, and feed hopper is in coniform.
（Three）Advantageous effect
The present invention provides a kind of efficient concrete mixers, have following advantageous effect：
（1）The efficient concrete mixer is used cooperatively feed inlet, can make the first agitator tank by being provided with feed hopper
It feeds more convenient, by being provided with first bearing, is used cooperatively second bearing, the rotation of first axis of rolling can be made more steady
It is fixed, by being provided with first motor, it is used cooperatively stirring rod and first axis of rolling, device stirring can be made more uniform, led to
Cross and be provided with slide plate, be used cooperatively pipeline, can the discharging of the first agitator tank it is more convenient, by being provided with pipeline, the can be made
The charging of two agitator tanks is more convenient, by being provided with pedestal, is used cooperatively bottom plate, the dress can be made more to stablize.
（2）The efficient concrete mixer can by by being provided with second axis of rolling, being used cooperatively agitating plate
So that the device is carried out secondary agitation, ensure that device material discharge is more convenient, by being provided with discharge nozzle, the dress can be made
It is more convenient to set discharge, by being provided with fourth bearing, is used cooperatively 3rd bearing, the rotation of second axis of rolling can be made more steady
It is fixed, the normal use of people is effectively ensured, by the popularization conducive to market.
Description of the drawings
Fig. 1 is the sectional view of the first agitator tank front view of the invention；
Fig. 2 is structure enlargement diagram at A in Fig. 1 of the present invention.
In figure：1 feed hopper, 2 first motors, 3 first bearings, 4 stirring rods, 5 first agitator tanks, 6 feed inlets, 7 second electricity
Machine, 8 discharge nozzles, 9 second axis of rolling, 10 agitating plates, 11 fourth bearings, 12 pipelines, 13 rubber pads, 14 bottom plates, 15 second bearings,
16 slide plates, 17 first axis of rolling, 18 3rd bearings, 19 second coupled wheels, 20 transmission belts, 21 first coupled wheels, 22 second stirrings
Case, the 23 third axis of rolling, 24 pedestals.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
- 2 are please referred to Fig.1, the present invention provides a kind of technical solution：A kind of efficient concrete mixer, including first stir
Case 5 is mixed, the inner bottom wall of the first agitator tank 5 is fixedly connected with slide plate 16 compatible with the first agitator tank 5, the upper surface of slide plate 16
Fixation is inlaid with second bearing 15, and the inner ring of second bearing 15 is fixedly connected with the outer surface of first axis of rolling, 17 bottom end, is made
Device discharging is more convenient, and the bottom surface of the first agitator tank 5 is fixedly connected with pedestal 24, and the bottom surface of pedestal 24 is upper with bottom plate 14
Surface is fixedly connected, and so that the device is more stablized, the left side of the first agitator tank 5 is fixedly connected with feed hopper 1, and feed hopper 1
In coniform, keep device charging more convenient, the top of 5 left side of the first agitator tank offers feed inlet 6, the first agitator tank
5 upper surface is fixed and is inlaid with first bearing 3, and the upper surface of the first agitator tank 5 is fixedly connected with first motor 2, first motor 2
Output end be fixedly connected with first axis of rolling 17, first one end of the axis of rolling 17 far from first motor 2 through first bearing 3 simultaneously
The inside of the first agitator tank 5 is extended to, and the outer surface of first axis of rolling 17 is fixedly connected with the inner ring of first bearing 3, first
The outer surface of the axis of rolling 17 is fixedly connected with stirring rod 4, and the right side of the first agitator tank 5 is placed with the second agitator tank 22, and second stirs
The madial wall fixation for mixing case 22 is inlaid with fourth bearing 11, the outer surface of 9 left end of the inner ring of fourth bearing 11 and second axis of rolling
It is fixedly connected, so that the rotation of fourth bearing 11 is more stablized, the bottom surface of the second agitator tank 22 is fixedly connected with bottom plate 14, bottom plate 14
Bottom surface is fixedly connected with rubber pad 13, makes the device is whole more to stablize, and the lower part of 5 right side of the first agitator tank, which is fixed, to be communicated with
Pipeline 12.
The one end of pipeline 12 far from the first agitator tank 5 is fixed with the top of 22 left side of the second agitator tank and is connected to, and second stirs
The right side fixation for mixing case 22 is inlaid with 3rd bearing 18, and the inside of the second agitator tank 22 is placed with second axis of rolling 9, the second rolling
The right end of moving axis 9 is through 3rd bearing 18 and extends to the outside of the second agitator tank 22, and the outer surface of second axis of rolling 9 and the
The inner ring of three bearings 18 is fixedly connected, and the outer surface of second axis of rolling 9 is fixedly connected with spiral agitating plate 10, the second rolling
The outer surface of 9 right end of moving axis is fixedly connected with the second coupled wheel 19, and the upper surface of the second agitator tank 22 is fixedly connected with the second electricity
The output end of machine 7, the second motor 7 is fixedly connected with the third axis of rolling 23, and the outer surface of the third axis of rolling 23 is fixedly connected with
One coupled wheel 21, the first coupled wheel 21 are sequentially connected with the second coupled wheel 19 by transmission belt 20,22 right side of the second agitator tank
Lower part be fixedly connected with discharge nozzle 8.
Operation principle：Material is added by staff, first motor 2, which is powered, to be started, and first motor 2 drives first axis of rolling
17 and stirring rod 4 rotation to material for the first time stir, under the action of slide plate 16, material by pipeline 12 enter the second agitator tank 22
Inside, the second motor 7 be powered start, second axis of rolling 9 drive agitating plate 10 rotation to material secondary agitation be discharged, complete work
Make.
In conclusion the efficient concrete mixer, can with the use of feed inlet 6 by being provided with feed hopper 1
So that the first agitator tank 5 is fed more convenient, by being provided with first bearing 3, is used cooperatively second bearing 15, the first rolling can be made
The rotation of moving axis 17 is more stablized, and by being provided with first motor 2, is used cooperatively stirring rod 4 and first axis of rolling 17, can be made this
Device stirring is more uniform, by being provided with slide plate 16, is used cooperatively pipeline 12, can the first agitator tank 5 discharge it is more convenient,
By being provided with pipeline 12, the second agitator tank 22 can be made to feed more convenient, by being provided with pedestal 24, be used cooperatively bottom plate
14, the dress can be made more to stablize, by by being provided with second axis of rolling 9, being used cooperatively agitating plate 10, the device can be made
Secondary agitation is carried out, ensure that device material discharge is more convenient, by being provided with discharge nozzle 8, the device discharge can be made
It is more convenient, by being provided with fourth bearing 11, it is used cooperatively 3rd bearing 18, the rotation of second axis of rolling 9 can be made more steady
It is fixed, the normal use of people is effectively ensured, by the popularization conducive to market.
It should be noted that herein, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (6)
1. a kind of efficient concrete mixer, including the first agitator tank（5）, it is characterised in that：First agitator tank（5）It is left
The top of side offers feed inlet（6）, first agitator tank（5）Upper surface fix be inlaid with first bearing（3）, described
First agitator tank（5）Upper surface be fixedly connected with first motor（2）, the first motor（2）Output end be fixedly connected with
First axis of rolling（17）, first axis of rolling（17）Far from first motor（2）One end run through first bearing（3）And it extends to
First agitator tank（5）Inside, and first axis of rolling（17）Outer surface and first bearing（3）Inner ring be fixedly connected, it is described
First axis of rolling（17）Outer surface be fixedly connected with stirring rod（4）, first agitator tank（5）Right side be placed with second and stir
Mix case（22）, first agitator tank（5）The lower part of right side is fixed and is communicated with pipeline（12）；
The pipeline（12）Far from the first agitator tank（5）One end and the second agitator tank（22）Connection is fixed on the top of left side,
Second agitator tank（22）Right side fix be inlaid with 3rd bearing（18）, second agitator tank（22）Inside place
There is second axis of rolling（9）, second axis of rolling（9）Right end run through 3rd bearing（18）And extend to the second agitator tank（22）
Outside, and second axis of rolling（9）Outer surface and 3rd bearing（18）Inner ring be fixedly connected, second axis of rolling（9）
Outer surface be fixedly connected with spiral agitating plate（10）, second axis of rolling（9）The outer surface of right end is fixedly connected
There is the second coupled wheel（19）, second agitator tank（22）Upper surface be fixedly connected with the second motor（7）, second motor
（7）Output end be fixedly connected with the third axis of rolling（23）, the third axis of rolling（23）Outer surface be fixedly connected with first
Coupled wheel（21）, first coupled wheel（21）With the second coupled wheel（19）Pass through transmission belt（20）It is sequentially connected, described second
Agitator tank（22）The lower part of right side is fixedly connected with discharge nozzle（8）.
2. a kind of efficient concrete mixer according to claim 1, it is characterised in that：First agitator tank（5）
Inner bottom wall be fixedly connected with and the first agitator tank（5）Compatible slide plate（16）, the slide plate（16）Upper surface fix edge
Embedded with second bearing（15）, and second bearing（15）Inner ring and first axis of rolling（17）The outer surface of bottom end is fixedly connected.
3. a kind of efficient concrete mixer according to claim 1, it is characterised in that：Second agitator tank（22）
Madial wall fixation be inlaid with fourth bearing（11）, the fourth bearing（11）Inner ring and second axis of rolling（9）Outside left end
Surface is fixedly connected.
4. a kind of efficient concrete mixer according to claim 1, it is characterised in that：Second agitator tank（22）
Bottom surface be fixedly connected with bottom plate（14）, the bottom plate（14）Bottom surface be fixedly connected with rubber pad（13）.
5. a kind of efficient concrete mixer according to claim 1, it is characterised in that：First agitator tank（5）
Bottom surface be fixedly connected with pedestal（24）, the pedestal（24）Bottom surface and bottom plate（14）Upper surface be fixedly connected.
6. a kind of efficient concrete mixer according to claim 1, it is characterised in that：First agitator tank（5）
Left side be fixedly connected with feed hopper（1）, and feed hopper（1）In coniform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810107118.2A CN108466361A (en) | 2018-02-02 | 2018-02-02 | A kind of efficient concrete mixer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810107118.2A CN108466361A (en) | 2018-02-02 | 2018-02-02 | A kind of efficient concrete mixer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108466361A true CN108466361A (en) | 2018-08-31 |
Family
ID=63266064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810107118.2A Pending CN108466361A (en) | 2018-02-02 | 2018-02-02 | A kind of efficient concrete mixer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108466361A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109632445A (en) * | 2018-12-28 | 2019-04-16 | 金陵科技学院 | The dedicated mixing apparatus of During Geotechnical Tests |
| CN111055377A (en) * | 2019-12-13 | 2020-04-24 | 吴满钢 | Concrete mixing device for roads and bridges |
| WO2020259283A1 (en) * | 2019-06-27 | 2020-12-30 | 四川宏华石油设备有限公司 | Mixing device |
| CN112156709A (en) * | 2020-09-29 | 2021-01-01 | 广州市圣丰混凝土有限公司 | Concrete aggregate premixing device |
| CN112207978A (en) * | 2020-09-27 | 2021-01-12 | 中交路桥建设有限公司 | Twice mixing equipment and production process thereof |
| CN112779839A (en) * | 2020-12-23 | 2021-05-11 | 徐州市融道路桥有限公司 | Filling device for road and bridge construction and working method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1060853A1 (en) * | 1999-06-16 | 2000-12-20 | San Marco International S.r.l. | Cement mixer with compact rotating mechanism on swivel-bucket arm |
| CN205466728U (en) * | 2016-01-25 | 2016-08-17 | 湖南文理学院 | High -performance concrete agitator is used in bridge construction |
| CN206106088U (en) * | 2016-10-26 | 2017-04-19 | 奎屯西部建设有限责任公司 | Concrete mixer convenient to output |
| CN106965317A (en) * | 2017-04-22 | 2017-07-21 | 徐勇 | Special automation mixed mud agitating device on a kind of construction site |
-
2018
- 2018-02-02 CN CN201810107118.2A patent/CN108466361A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1060853A1 (en) * | 1999-06-16 | 2000-12-20 | San Marco International S.r.l. | Cement mixer with compact rotating mechanism on swivel-bucket arm |
| CN205466728U (en) * | 2016-01-25 | 2016-08-17 | 湖南文理学院 | High -performance concrete agitator is used in bridge construction |
| CN206106088U (en) * | 2016-10-26 | 2017-04-19 | 奎屯西部建设有限责任公司 | Concrete mixer convenient to output |
| CN106965317A (en) * | 2017-04-22 | 2017-07-21 | 徐勇 | Special automation mixed mud agitating device on a kind of construction site |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109632445A (en) * | 2018-12-28 | 2019-04-16 | 金陵科技学院 | The dedicated mixing apparatus of During Geotechnical Tests |
| WO2020259283A1 (en) * | 2019-06-27 | 2020-12-30 | 四川宏华石油设备有限公司 | Mixing device |
| CN111055377A (en) * | 2019-12-13 | 2020-04-24 | 吴满钢 | Concrete mixing device for roads and bridges |
| CN112207978A (en) * | 2020-09-27 | 2021-01-12 | 中交路桥建设有限公司 | Twice mixing equipment and production process thereof |
| CN112156709A (en) * | 2020-09-29 | 2021-01-01 | 广州市圣丰混凝土有限公司 | Concrete aggregate premixing device |
| CN112779839A (en) * | 2020-12-23 | 2021-05-11 | 徐州市融道路桥有限公司 | Filling device for road and bridge construction and working method thereof |
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| SE01 | Entry into force of request for substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180831 |