CN106986171B - Oil drum lifting device suitable for oil field - Google Patents
Oil drum lifting device suitable for oil field Download PDFInfo
- Publication number
- CN106986171B CN106986171B CN201710301417.5A CN201710301417A CN106986171B CN 106986171 B CN106986171 B CN 106986171B CN 201710301417 A CN201710301417 A CN 201710301417A CN 106986171 B CN106986171 B CN 106986171B
- Authority
- CN
- China
- Prior art keywords
- oil drum
- oil
- sliding shoe
- placing groove
- bar
- 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.)
- Expired - Fee Related
Links
- 230000014759 maintenance of location Effects 0.000 claims description 9
- 230000007423 decrease Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 68
- 239000010687 lubricating oil Substances 0.000 description 11
- 239000002199 base oil Substances 0.000 description 10
- 239000003208 petroleum Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 5
- 229930195733 hydrocarbon Natural products 0.000 description 4
- 150000002430 hydrocarbons Chemical class 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 150000001335 aliphatic alkanes Chemical class 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 2
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 150000001924 cycloalkanes Chemical class 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000001345 alkine derivatives Chemical class 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012075 bio-oil Substances 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002917 insecticide Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910017464 nitrogen compound Inorganic materials 0.000 description 1
- 150000002830 nitrogen compounds Chemical class 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/74—Feeding, transfer, or discharging devices of particular kinds or types
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
The invention discloses the oil drum lifting devices for being suitable for oil field, including support frame, there are two sliding bars for setting on support frame, there are two sliding shoes one for setting on each sliding bar, rotating bar is provided on sliding shoe one, rotating bar is provided with oil drum placing groove far from one end of sliding shoe one, catch bar is provided between two rotating bars of oil drum placing groove the same side, guiding device is provided with below catch bar, guide groove is provided on guiding device, sliding shoe two is provided in guide groove, screw rod is provided through on the sliding shoe two of oil drum placing groove two sides, sliding shoe two is screwed with screw rod.The present invention is moved in or out simultaneously by the rotation of screw rod, sliding shoe two, and oil drum placing groove is raised and lowered in rotating bar rotation, convenient for the raising or decline of oil drum, is saved labour, is improved efficiency.
Description
Technical field
The present invention relates to lifting devices, and in particular to the oil drum lifting device suitable for oil field.
Background technique
Petroleum, one of main object of geological prospecting are a kind of sticky, dark brown liquid, referred to as " industrial blood
Liquid ".There are petroleum storage in upper crustal some areas.Main component is the mixture of various alkane, cycloalkane, aromatic hydrocarbon.Petroleum
It is mainly made of different hydrocarbon mixing, the chemical element for forming petroleum is mainly carbon (83%~87%), hydrogen
(11%~14%), remaining is sulphur (0.06%~0.8%), nitrogen (0.02%~1.7%), oxygen (0.08%~1.82%) and micro-
It measures metallic element (Ni-V-Fe, antimony etc.).The chief component that the hydro carbons formed constitutes petroleum is closed by carbon and hydrogenation, is accounted for about
95%~99%, various hydro carbons are divided by its structure: alkane, cycloalkane, aromatic hydrocarbon.General natural oil not olefin-containing and it is secondary
It processes and often contains alkene and alkynes in varying numbers in product.Sulfur-bearing, oxygen, nitrogen compound are to oil product nocuousness, in petroleum
Petroleum should be removed in processing as far as possible and is mainly used as fuel oil and gasoline and many chemical industries, such as solution is changed
The raw material of fertilizer, insecticide and plastics etc..Lubricating oil is used in various types automobile, on mechanical equipment to reduce friction, protect machine
The liquid or semisolid lubricants of tool and workpiece mainly play lubrication, supplement heat rejecter, antirust, cleaning, sealing and buffering etc. and make
With, as long as applied between the object of two relative motions, and friction and mill that two articles are generated by contact can be reduced
The function of damage, as lubricating oil.Lubricating oil is a kind of technology-intensive product, is the mixture of complicated hydrocarbon, and
Its real service performance is the comprehensive effect of complicated physically or chemically change procedure again.Lubricating oil is generally by base oil and addition
Agent two parts composition.Base oil is the main component of lubricating oil, decides the fundamental property of lubricating oil, additive can then make up and
Improve the deficiency of base oil aspect of performance, assigns certain new performances, be the important component of lubricating oil.Lube base oil
Mainly divide mineral base oil, synthetic base oil and biological basis oil three categories.Mineral base oil is widely used, and dosage is very big
(about 95% or more), but some applications must then use the product of synthetic base oil and bio oil formulation of base oil, thus
Rapidly develop both base oils.
Oil drum is used to store the device of petroleum or lubricating oil, currently, some oil field mechanical equipments are huger,
When needing oil lubrication in use, it usually needs the transport back and forth of oil is lubricated with keg, when consuming
Between and labour, and in the handling process of oil drum, manually being operated also has certain risk；Also, use crane
Equal hanging devices are at high cost, and the use condition of hanging device is often restricted.
Summary of the invention
It is inconvenient when the technical problem to be solved by the present invention is to aloft use lubricating oil, and existing hanging device at
This is higher, and for the more problem of use condition limitation, and it is an object of the present invention to provide being suitable for the oil drum lifting device of oil field, solution is above-mentioned
Problem, the present disclosure applies equally to store the oil drum of petroleum.
The present invention is achieved through the following technical solutions:
Suitable for the oil drum lifting device of oil field, including support frame, there are two sliding bars for setting on support frame, each
There are two sliding shoes one, sliding shoe one can move along sliding bar for setting on sliding bar；Rotation is provided on sliding shoe one
Bar, rotating bar can rotate around the junction of itself and sliding shoe one, hinged mode can be used and fix；Rotating bar is far from sliding shoe
One one end is provided with oil drum placing groove, and the two sides of oil drum placing groove are provided with platform, and four rotating bars can be connected to
On four angles of oil drum placing groove two sides platform；
It is provided with catch bar between two rotating bars of oil drum placing groove the same side, guiding dress is provided with below catch bar
It sets, guide groove is provided on guiding device, sliding shoe two is provided in guide groove, and sliding shoe two can be moved along guide groove,
The catch bar of oil drum placing groove two sides passes through connecting rod and is connected with sliding shoe two, on the sliding shoe two of oil drum placing groove two sides
It is provided through screw rod, sliding shoe two is screwed with screw rod；Sliding shoe two and screw rod in guide groove are divided into two groups of left and right, accordingly
Catch bar and connecting rod be also classified into two groups of left and right, when two groups of screw rods rotate simultaneously, sliding shoe two moves inward simultaneously, rotating bar
Rotation, oil drum placing groove increase, and when two groups of screw rods rotate backward simultaneously, sliding shoe two is displaced outwardly simultaneously, rotating bar rotation, oil
Bucket placing groove reduces.
Further, two sides are provided with auxiliary retention portion on the oil drum placing groove, are provided between auxiliary retention portion
Flexible fastening rope is fixed in auxiliary retention portion by flexible fastening rope after oil drum is placed into oil drum placing groove, adjusts elasticity
The length of fixed rope and elastic, oil drum is fixed, oil drum placing groove tilt angle excessive the case where causing oil drum to slide is avoided.
Further, oil drum placing groove upper surface is inner concave arc surface, and one end tilts down, the inclination angle of oil drum
Degree, is allowed to easily facilitate and pours out lubricating oil, convenient and strength-saving.
Further, described lower one end of oil drum placing groove is provided with baffle, and the effect of baffle is to avoid oil drum from oil
It is slid in bucket placing groove.
Further, the screw rod is respectively connected with driving device, and driving device drives screw rod rotation, and driving device may be selected
Motor.
Further, the driving device is respectively connected with controller, and controller is PLC controller common on the market, uses
To control the driving device of two sides while rotate.
Further, the bottom of support frame as described above and guiding device is provided with the universal wheel with locking device, is convenient for
The carrying and movement of oil drum.
Compared with prior art, the present invention having the following advantages and benefits:
The present invention is suitable for the oil drum lifting device of oil field, by the rotation of screw rod, sliding shoe two simultaneously inwardly or
It is displaced outwardly, oil drum placing groove is raised and lowered in rotating bar rotation, convenient for the raising or decline of oil drum, saves labour, mentions
High efficiency.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is schematic structural view of the invention；
Fig. 2 is guiding device schematic diagram of internal structure of the present invention.
Label and corresponding parts title in attached drawing:
1- support frame, 2- sliding bar, 3- sliding shoe one, 4- rotating bar, 5- oil drum placing groove, 6- guiding device, 7- guiding
Slot, 8- sliding shoe two, 9- screw rod, 10- auxiliary retention portion, 11- flexible fastening rope, 12- baffle, 13- catch bar, 14- connecting rod,
15- driving device, 16- universal wheel.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation for explaining only the invention, are not made
For limitation of the invention.
Embodiment
As shown in FIG. 1 to FIG. 2, suitable for the oil drum lifting device of oil field, including support frame 1, it is arranged on support frame 1
There are two sliding bar 2, it is arranged on each sliding bar 2 there are two sliding shoe 1, sliding shoe 1 can be moved along sliding bar 2；
Rotating bar 4 is provided on sliding shoe 1, rotating bar 4 can be rotated around the junction of itself and sliding shoe 1, be can be used hinged
Mode fix；Rotating bar 4 is provided with oil drum placing groove 5 far from one end of sliding shoe 1, and 5 upper surface of oil drum placing groove is interior
Cancave cambered surface, and one end tilts down, the tilt angle of oil drum, is allowed to easily facilitate and pours out lubricating oil, it is convenient and strength-saving；Oil drum is placed
The two sides of slot 5 are provided with platform, and four rotating bars 4 can be connected on four angles of 5 two sides platform of oil drum placing groove.
It is provided with catch bar 13 between two rotating bars 4 of 5 the same side of oil drum placing groove, is provided with and leads below catch bar 13
To device 6, it is provided with guide groove 7 on guiding device 6, is provided with sliding shoe 28 in guide groove 7, and sliding shoe 28 can be along leading
Mobile to slot 7, the catch bar 13 of 5 two sides of oil drum placing groove is connected by connecting rod 14 with sliding shoe 28, oil drum placing groove 5
Screw rod 9 is provided through on the sliding shoe 28 of two sides, sliding shoe 28 is screwed with screw rod 9；Sliding shoe two in guide groove 7
8 and screw rod 9 be divided to for two groups of left and right, corresponding catch bar 13 and connecting rod 14 are also classified into two groups of left and right, and two groups of screw rods 9 rotate simultaneously
When, sliding shoe 28 moves inward simultaneously, and rotating bar 4 rotates, and oil drum placing groove 5 increases, when two groups of screw rods 9 rotate backward simultaneously,
Sliding shoe 28 is displaced outwardly simultaneously, and rotating bar 4 rotates, and oil drum placing groove 5 reduces；Screw rod 9 is respectively connected with driving device 15, drives
Dynamic device 15 drives screw rod 9 to rotate, and motor may be selected in driving device；Driving device 15 is respectively connected with controller, and controller is city
Common PLC controller on face, for controlling the driving device of two sides while rotating.
Two sides are provided with auxiliary retention portion 10 on oil drum placing groove 5, and flexible fastening rope is provided between auxiliary retention portion 4
11, after oil drum is placed into oil drum placing groove 5, flexible fastening rope 11 is fixed in auxiliary retention portion 10, it is solid to adjust elasticity
Surely 11 length of rope and elastic, oil drum is fixed, the excessive feelings for causing oil drum to slide of 5 tilt angle of oil drum placing groove are avoided
Condition；The lower one end of oil drum placing groove 5 is provided with baffle 12, and the effect of baffle 12 is to avoid oil drum sliding out of oil drum placing groove 5
It falls；The bottom of support frame 1 and guiding device 6 is provided with the universal wheel 16 with locking device, convenient for the carrying and shifting of oil drum
It is dynamic.
For ease of understanding, use process of the present invention is described as follows: oil drum is placed on oil drum placing groove 5, driving dress
The rotation of 15 driving screw rods 9 is set, when two groups of screw rods 9 rotate simultaneously, sliding shoe 28 moves inward simultaneously, and rotating bar 4 rotates, oil drum
Placing groove 5 increases；Driving device 15 drives screw rod 9 to rotate backward, and when two groups of screw rods 9 rotate backward simultaneously, sliding shoe 28 is simultaneously
It is displaced outwardly, rotating bar 4 rotates, and oil drum placing groove 5 reduces.
Above specific embodiment has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects
Illustrate, it should be understood that the above is only a specific embodiment of the invention, the protection model that is not intended to limit the present invention
It encloses, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the present invention
Protection scope within.
Claims (7)
1. being suitable for the oil drum lifting device of oil field, including support frame (1), which is characterized in that support frame as described above is set on (1)
There are two setting sliding bar (2), there are two sliding shoes one (3) for setting on each sliding bar (2), and sliding shoe one (3) can be along cunning
Lever (2) is mobile；It is provided on sliding shoe one (3) rotating bar (4), rotating bar (4) can be around the company of itself and sliding shoe one (3)
Connect place's rotation；Rotating bar (4) is provided with oil drum placing groove (5) far from one end of sliding shoe one (3)；
It is provided with catch bar (13) between two rotating bars (4) of described oil drum placing groove (5) the same side, below catch bar (13)
It is provided with guiding device (6), is provided on guiding device (6) guide groove (7), be provided with sliding shoe two (8) in guide groove (7),
And sliding shoe two (8) can be mobile along guide groove (7), the catch bar (13) of oil drum placing groove (5) two sides passes through connection
Bar (14) is connected with sliding shoe two (8), is provided through screw rod (9) on the sliding shoe two (8) of oil drum placing groove (5) two sides,
Sliding shoe two (8) is screwed with screw rod (9).
2. the oil drum lifting device according to claim 1 suitable for oil field, which is characterized in that the oil drum is placed
Two sides are provided with auxiliary retention portion (10) on slot (5), and flexible fastening rope (11) are provided between auxiliary retention portion (10).
3. the oil drum lifting device according to claim 1 suitable for oil field, which is characterized in that the oil drum is placed
Slot (5) upper surface is inner concave arc surface, and one end tilts down.
4. the oil drum lifting device according to claim 3 suitable for oil field, which is characterized in that the oil drum is placed
Slot (5) lower one end is provided with baffle (12).
5. the oil drum lifting device according to claim 1 suitable for oil field, which is characterized in that the screw rod (9)
It is respectively connected with driving device (15), driving device (15) drives screw rod (9) rotation.
6. the oil drum lifting device according to claim 5 suitable for oil field, which is characterized in that the driving device
(15) it is respectively connected with controller.
7. the oil drum lifting device according to claim 1 suitable for oil field, which is characterized in that support frame as described above
(1) and the bottom of guiding device (6) is provided with the universal wheel (16) with locking device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710301417.5A CN106986171B (en) | 2017-05-02 | 2017-05-02 | Oil drum lifting device suitable for oil field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710301417.5A CN106986171B (en) | 2017-05-02 | 2017-05-02 | Oil drum lifting device suitable for oil field |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106986171A CN106986171A (en) | 2017-07-28 |
| CN106986171B true CN106986171B (en) | 2019-02-19 |
Family
ID=59418355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710301417.5A Expired - Fee Related CN106986171B (en) | 2017-05-02 | 2017-05-02 | Oil drum lifting device suitable for oil field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106986171B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3039628A (en) * | 1958-10-16 | 1962-06-19 | Tide L P G Edinburg | Tank lift |
| US4856836A (en) * | 1987-11-13 | 1989-08-15 | Conoco Inc. | Sling assembly for use with a crane |
| WO2003066296A1 (en) * | 2002-02-09 | 2003-08-14 | Yen Huat Sdn Bhd | Mobile oil palm trees shredder (mobots) |
| CN103465091A (en) * | 2013-09-18 | 2013-12-25 | 中国科学院光电技术研究所 | Sliding rail lifting device |
| CN204296808U (en) * | 2014-12-23 | 2015-04-29 | 马鞍山市天鑫辊业有限责任公司 | A kind of oil drum blowing car |
| CN204896222U (en) * | 2015-08-24 | 2015-12-23 | 海力财富集团有限公司 | Mining oil drum oil drain ware |
| CN205634771U (en) * | 2016-04-19 | 2016-10-12 | 湖北汇利机械科技有限公司 | Multi -functional oil drum carrier |
| CN106429975A (en) * | 2016-10-27 | 2017-02-22 | 合肥汉德贝尔属具科技有限公司 | Forklift working device with lifting mechanism |
| CN206014334U (en) * | 2016-08-22 | 2017-03-15 | 湖州万士乐建筑工程机械有限公司 | A kind of barrel handling carrier |
-
2017
- 2017-05-02 CN CN201710301417.5A patent/CN106986171B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3039628A (en) * | 1958-10-16 | 1962-06-19 | Tide L P G Edinburg | Tank lift |
| US4856836A (en) * | 1987-11-13 | 1989-08-15 | Conoco Inc. | Sling assembly for use with a crane |
| WO2003066296A1 (en) * | 2002-02-09 | 2003-08-14 | Yen Huat Sdn Bhd | Mobile oil palm trees shredder (mobots) |
| CN103465091A (en) * | 2013-09-18 | 2013-12-25 | 中国科学院光电技术研究所 | Sliding rail lifting device |
| CN204296808U (en) * | 2014-12-23 | 2015-04-29 | 马鞍山市天鑫辊业有限责任公司 | A kind of oil drum blowing car |
| CN204896222U (en) * | 2015-08-24 | 2015-12-23 | 海力财富集团有限公司 | Mining oil drum oil drain ware |
| CN205634771U (en) * | 2016-04-19 | 2016-10-12 | 湖北汇利机械科技有限公司 | Multi -functional oil drum carrier |
| CN206014334U (en) * | 2016-08-22 | 2017-03-15 | 湖州万士乐建筑工程机械有限公司 | A kind of barrel handling carrier |
| CN106429975A (en) * | 2016-10-27 | 2017-02-22 | 合肥汉德贝尔属具科技有限公司 | Forklift working device with lifting mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106986171A (en) | 2017-07-28 |
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