CN111396335B - Gas drainage system for pipeline welding in tunnel - Google Patents
Gas drainage system for pipeline welding in tunnel Download PDFInfo
- Publication number
- CN111396335B CN111396335B CN202010218707.5A CN202010218707A CN111396335B CN 111396335 B CN111396335 B CN 111396335B CN 202010218707 A CN202010218707 A CN 202010218707A CN 111396335 B CN111396335 B CN 111396335B
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- China
- Prior art keywords
- interlayer
- air suction
- air
- suction cover
- pipe
- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/04—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area from a small area, e.g. a tool
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/002—Details, component parts, or accessories especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/403—Casings; Connections of working fluid especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/601—Mounting; Assembling; Disassembling specially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
- F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Ventilation (AREA)
Abstract
The invention discloses a gas sewage system for pipeline welding in a tunnel, which comprises a movable air suction cover and a case, wherein the air suction cover and the case are connected through a hose. The air suction cover is of a conical tubular structure with a head; the air suction cover is of a double-layer structure comprising an interlayer; a gas jet is formed in a gap between the interlayer and the outer wall; the tubular structure enclosed by the interlayer is an air suction port; the outer wall and the interlayer at the end with larger size of the air suction cover are both provided with a folding telescopic part; each folding telescopic part comprises a telescopic framework and a flexible shielding layer covering the corresponding telescopic framework; the case comprises a blower and an exhaust fan which are communicated with the air suction cover through hoses; one end of the hose connected with the air suction cover is of a concentric double-layer pipe structure, and an inner pipe of the concentric double-layer pipe structure is connected with the interlayer; the outer pipe of the concentric double-layer pipe structure is connected with the outer wall. The application of the invention can deal with different welding working conditions, so that the air exhaust efficiency is maximized under each working condition.
Description
Technical Field
The invention relates to the technical field of welding protection, in particular to a gas drainage system for pipeline welding in a tunnel.
Background
The welding smoke dust contains a large amount of heavy metals such as Fe, Mn, Mg and the like, and related welding work is carried out for a long time, the probability of respiratory diseases is greatly increased, and serious harm is caused to a human body.
The most welding places adopt a local ventilation mode, because the smoke generated by welding is discharged at fixed points and has larger smoke content, the suction hood is arranged near the welding operation point and discharges the smoke without waiting for the diffusion of the smoke, thus the required exhaust amount is about 1/3 of comprehensive exhaust, the smoke discharging effect is good, and the problem that welders suck welding pollutants is fundamentally reduced.
Most of the existing air suction hoods are limited by themselves and can only adapt to one working condition, the efficiency of removing smoke dust is reduced when the working condition is changed, equipment needs to be changed frequently, more capital cost and energy waste are caused, and if the size of an air suction hood opening is fixed when pipelines with different pipe diameters are welded, the ventilation effect of pipelines with certain pipe diameters can be reduced.
If the current air suction cover is different according to the position of the cover opening, the air suction cover is divided into a side suction cover, a lower air suction cover and an upper air suction cover; mobile and stationary types are classified according to whether they can move or not. But no matter which kind of cover of breathing in all has self limitation, only to one kind or several kinds of operating modes, does not have the commonality, and cover mouthful size is mostly fixed, when changing welding condition, and the effect of getting rid of the smoke and dust is probably not obvious.
Therefore, how to adapt the exhaust hood to various working conditions and ensure that the efficiency of exhausting smoke dust reaches the maximum, the exhaust equipment does not need to be replaced frequently, which is a technical problem that needs to be solved urgently by technical personnel in the field.
Disclosure of Invention
In view of the above defects in the prior art, the invention provides a gas drainage system for pipeline welding in a tunnel, which can cope with different working conditions and maximize the air exhaust efficiency under each working condition.
In order to achieve the purpose, the invention discloses a gas sewage system for pipeline welding in a tunnel, which comprises a suction hood and a case, wherein the suction hood and the case are connected through a hose.
Wherein the air suction cover is of a conical tubular structure with a head; the air suction cover is of a double-layer structure comprising an interlayer; a gas jet is formed in a gap between the interlayer and the outer wall; the tubular structure enclosed by the interlayer is an air suction port;
the outer wall of one end of the air suction cover with a larger size and the interlayer are both provided with a folding telescopic part; each folding telescopic part comprises a telescopic framework and a flexible shielding layer;
each telescopic framework comprises a plurality of telescopic rods; the telescopic rods are uniformly distributed at one end with larger interlayer size and one end with larger outer wall size around the middle shaft of the air suction cover;
the flexible shielding layer covers the corresponding telescopic framework;
the case comprises a blower and an exhaust fan; the air outlet of the air feeder and the air inlet of the exhaust fan are communicated with the air suction cover through the hose;
one end of the hose connected with the air suction cover is of a concentric double-layer pipe structure, and an inner pipe of the concentric double-layer pipe structure is connected with the interlayer; the outer pipe of the concentric double-layer pipe structure is connected with the outer wall, so that the interlayer space between the inner pipe and the outer pipe is communicated with the gas injection port;
one end of the hose connected with the case comprises an air outlet end communicated with the inner pipe and an air inlet end communicated with the outer pipe;
the air outlet end is connected with an air inlet of the exhaust fan; the air inlet end is connected with an air outlet of the air feeder.
Preferably, the air outlet of the exhaust fan is provided with a dust remover.
Preferably, the case is provided with a regulating device of the blower and the exhaust fan.
Preferably, the air inlet channel of the blower in the case and the air outlet channel of the exhaust fan in the case share one air port.
Preferably, the interlayer is connected with the inner pipe, and the outer wall is connected with the outer pipe in a threaded connection mode.
Preferably, each telescopic rod at least comprises two hollow tubular rod bodies which are sleeved to form a sliding pair, and each two adjacent tubular rod bodies are fixed through a ball-touching pin or a set screw.
Preferably, the flexible shielding layer is made of canvas materials.
The invention has the beneficial effects that:
the application of the invention can deal with different welding working conditions, so that the air exhaust efficiency is maximized under each working condition.
The invention is provided with the adjusting device of the air feeder and the exhaust fan at the position of the case, can control the air quantity according to the speed of generating smoke dust, can keep the efficiency and can avoid resource waste caused by always large air quantity.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Drawings
Fig. 1 shows a schematic structural diagram of an embodiment of the present invention.
FIG. 2 is a schematic diagram illustrating the flow of air during operation of an embodiment of the present invention.
FIG. 3 is a schematic view of a suction hood according to an embodiment of the present invention.
FIG. 4 is a schematic view showing a configuration of a contracted state of the foldable expansion portion of the suction hood according to an embodiment of the present invention.
Detailed Description
Examples
As shown in fig. 1 to 4, the gas sewage system for pipeline welding in a tunnel comprises a suction hood 1 and a cabinet 2, wherein the suction hood 1 and the cabinet 2 are connected through a hose 3.
The air suction cover 1 is of a conical tubular structure with a head; the air suction cover is of a double-layer structure comprising an interlayer 11; the gap between the interlayer 11 and the outer wall 13 forms an air jet 12; the tubular structure enclosed by the interlayer 11 is an air suction port 14;
the outer wall 13 of one end with larger size of the air suction cover and the interlayer 11 are both provided with a folding telescopic part; each folding telescopic part comprises a telescopic framework 15 and a flexible shielding layer 16;
each telescopic framework 15 comprises a plurality of telescopic rods 17; a plurality of telescopic rods 17 are uniformly distributed at one end with larger size of the corresponding interlayer 11 and one end with larger size of the corresponding outer wall 13 around the middle shaft of the air suction cover;
the flexible shielding layer 16 covers the corresponding telescopic framework 15;
the case 2 includes a blower 21 and an exhaust fan 22; the air outlet of the blower 21 and the air inlet of the exhaust fan 22 are communicated with the air suction cover 1 through the hose 3;
one end of the hose 3 connected with the air suction cover 1 is of a concentric double-layer pipe structure, and an inner pipe 31 of the concentric double-layer pipe structure is connected with the interlayer 11; the outer pipe 32 of the concentric double-layer pipe structure is connected with the outer wall 13, so that the interlayer space between the inner pipe 31 and the outer pipe 32 is communicated with the gas injection port 12;
one end of the hose 3 connected with the case 2 comprises an air outlet end 33 communicated with the inner pipe 31 and an air inlet end 34 communicated with the outer pipe 32;
the air outlet end 33 is connected with the air inlet of the exhaust fan 22; the air inlet end 34 is connected with an air outlet of the blower 21.
The invention mainly comprises two systems, wherein the first system is an exhaust system, the air suction cover 1 is a double-layer structure comprising an interlayer, an air jet 12 is formed in a gap between the double-layer structure, a suction port is formed inside the air jet 12, and the suction port is formed inside the air jet 12 and is respectively connected with a blower 21 and an exhaust fan 22.
Welding fume is sucked from the air suction cover 1 by the negative pressure generated by the exhaust fan 22, then is dedusted 4 by the deduster, and waste is collected by the collecting device; the purified air is carried in again by the blower 21;
the second system is an air supply system, and the gas treated by the dust collector 4 and the outdoor air introduced by the air supply machine 21 are taken into the air injection ports 12 outside the air suction cover 1 to be sprayed out, so that the outward diffusion of welding smoke dust is isolated, and the absorption efficiency of the smoke dust is improved.
The air suction cover 1 is connected with the case 2 through a hose 3, and the hose 3 and the shell are telescopic plastic pipes. The shell plays the effect of fixed inner tube position promptly, can regulate and control the angle of wanting again at will, but side suction, updraft and downdraft have increased the service behavior.
The double-layer structure that the cover 1 department of breathing in including the intermediate layer can be taken inside unnecessary intermediate layer out when needing, and the increase area of the cover 1 of breathing in can correspond different circumstances, forms the cover 1 of breathing in of multiple not equidimension, and in practical application, operating personnel chooses the most suitable, makes the efficiency of airing exhaust all reach the biggest under each operating mode, compares with prior art, has better availability factor.
In some embodiments, the air outlet of the exhaust fan 22 is provided with a dust remover 4.
In some embodiments, the cabinet 2 is provided with a conditioning device 5 of a blower 21 and an exhaust fan 22.
In some embodiments, the air intake passage of the blower 21 in the cabinet 2 and the air exhaust passage of the exhaust fan 22 in the cabinet 2 share one air opening 6.
In some embodiments, the interlayer 11 and the inner pipe 31, and the outer wall 13 and the outer pipe 32 are connected by screw threads.
In some embodiments, each telescopic rod 17 comprises at least two hollow tubular rods sleeved to form a sliding pair, and each two adjacent tubular rods are fixed by a ball-touching pin or a set screw.
In some embodiments, the flexible cover 16 is made of canvas material.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (5)
1. The gas pollution discharge system for the pipeline welding in the tunnel comprises a suction hood (1) and a case (2), wherein the suction hood (1) and the case (2) are connected through a hose (3); the method is characterized in that:
the air suction cover (1) is of a conical tubular structure with a head; the air suction cover is of a double-layer structure comprising an interlayer (11); a gas jet (12) is formed in a gap between the interlayer (11) and the outer wall (13); the tubular structure surrounded by the interlayer (11) is an air suction port (14);
the outer wall (13) and the interlayer (11) at the end with the larger size of the air suction cover are both provided with a folding telescopic part; each folding telescopic part comprises a telescopic framework (15) and a flexible shielding layer (16);
each telescopic framework (15) comprises a plurality of telescopic rods (17); the telescopic rods (17) are uniformly distributed at one end with larger size of the corresponding interlayer (11) and one end with larger size of the corresponding outer wall (13) in a surrounding way around the central axis of the air suction cover;
the flexible shielding layer (16) covers the corresponding telescopic skeleton (15);
the case (2) comprises a blower (21) and an exhaust fan (22); the air outlet of the blower (21) and the air inlet of the exhaust fan (22) are communicated with the air suction cover (1) through the hose (3);
one end of the hose (3) connected with the air suction cover (1) is of a concentric double-layer pipe structure, and an inner pipe (31) of the concentric double-layer pipe structure is connected with the interlayer (11); the outer pipe (32) of the concentric double-layer pipe structure is connected with the outer wall (13) so that the interlayer space between the inner pipe (31) and the outer pipe (32) is communicated with the gas injection port (12);
one end of the hose (3) connected with the case (2) comprises an air outlet end (33) communicated with the inner pipe (31) and an air inlet end (34) communicated with the outer pipe (32);
the air outlet end (33) is connected with an air inlet of the exhaust fan (22); the air inlet end (34) is connected with an air outlet of the blower (21);
the air inlet channel of the blower (21) in the case (2) and the air outlet channel of the exhaust fan (22) in the case (2) share one air port (6);
each telescopic rod (17) at least comprises two hollow tubular rod bodies which are sleeved to form a sliding pair, and each two adjacent tubular rod bodies are fixed through ball-touching pins or set screws.
2. Gas sewer system for intraductal tunnel welding according to claim 1, characterized in that the air outlet of the exhaust fan (22) is provided with a dust separator (4).
3. Gas sewer system for intraductal tunnel welding according to claim 1, characterized in that the cabinet (2) is provided with regulation means (5) of the blower (21) and of the exhaust fan (22).
4. Gas sewer system for pipe welding in tunnels according to claim 1, characterized in that the connection between the interlayer (11) and the inner pipe (31) and between the outer wall (13) and the outer pipe (32) is threaded.
5. A gas sewer system for pipe welding in tunnels according to claim 1, characterized in that the flexible shielding layer (16) is made of canvas material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010218707.5A CN111396335B (en) | 2020-03-25 | 2020-03-25 | Gas drainage system for pipeline welding in tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010218707.5A CN111396335B (en) | 2020-03-25 | 2020-03-25 | Gas drainage system for pipeline welding in tunnel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111396335A CN111396335A (en) | 2020-07-10 |
| CN111396335B true CN111396335B (en) | 2022-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010218707.5A Active CN111396335B (en) | 2020-03-25 | 2020-03-25 | Gas drainage system for pipeline welding in tunnel |
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| Country | Link |
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| CN (1) | CN111396335B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112975217B (en) * | 2021-02-05 | 2023-05-26 | 重庆大江国立精密机械制造有限公司 | Dust collecting equipment for welding automobile spare and accessory parts |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1355877A (en) * | 1999-07-01 | 2002-06-26 | 大金工业株式会社 | Tornado type intake and blowing device |
| CN201799445U (en) * | 2010-07-06 | 2011-04-20 | 李立 | Dustproof telescopic hood for gravity dust separator of blast furnace |
| CN109570833A (en) * | 2018-11-26 | 2019-04-05 | 南安市建泉机械科技有限公司 | A kind of weldering cigarette converting apparatus with weldering grain separation function of construction site |
| CN110038871A (en) * | 2018-01-15 | 2019-07-23 | 刘汉军 | A kind of environmental protection, energy conservation, transparent flue gas, dust seal dust excluding hood |
| CN209204935U (en) * | 2018-09-28 | 2019-08-06 | 长沙吉天环保科技有限公司 | A kind of tornado circulating dust-removing work station |
| CN209439166U (en) * | 2018-12-10 | 2019-09-27 | 王甜甜 | The protection isolation cover of adjustable size |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR87162E (en) * | 1964-07-16 | 1966-06-24 | Loire Atel Forges | Method and device for regulating the capture of oxygen refining gases |
| KR100347959B1 (en) * | 2001-12-28 | 2002-08-21 | Ecta Co Ltd | Ventilation hood for kitchen |
| DE102012022572A1 (en) * | 2012-11-20 | 2014-05-22 | minEnergy GmbH | Extractor hood for extracting ambient air from space volume above cooktop contaminated with suspended particles, has filter element provided on inflow or outflow side of fan, and element link that separates suspended particles from airflow |
| US11530826B2 (en) * | 2015-07-16 | 2022-12-20 | Illinois Tool Works Inc. | Extractor with segmented positive pressure airflow system |
| CN209865644U (en) * | 2019-01-18 | 2019-12-31 | 湖北天利化建工程有限公司 | Welding fume purification device |
| CN210009748U (en) * | 2019-05-21 | 2020-02-04 | 淄博金宇钢结构有限公司 | Steel sheet welding shop environmental protection equipment |
-
2020
- 2020-03-25 CN CN202010218707.5A patent/CN111396335B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1355877A (en) * | 1999-07-01 | 2002-06-26 | 大金工业株式会社 | Tornado type intake and blowing device |
| CN201799445U (en) * | 2010-07-06 | 2011-04-20 | 李立 | Dustproof telescopic hood for gravity dust separator of blast furnace |
| CN110038871A (en) * | 2018-01-15 | 2019-07-23 | 刘汉军 | A kind of environmental protection, energy conservation, transparent flue gas, dust seal dust excluding hood |
| CN209204935U (en) * | 2018-09-28 | 2019-08-06 | 长沙吉天环保科技有限公司 | A kind of tornado circulating dust-removing work station |
| CN109570833A (en) * | 2018-11-26 | 2019-04-05 | 南安市建泉机械科技有限公司 | A kind of weldering cigarette converting apparatus with weldering grain separation function of construction site |
| CN209439166U (en) * | 2018-12-10 | 2019-09-27 | 王甜甜 | The protection isolation cover of adjustable size |
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| Publication number | Publication date |
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| CN111396335A (en) | 2020-07-10 |
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Address after: 162 Weifang Road, China (Shanghai) pilot Free Trade Zone, Pudong New Area, Shanghai, 201200 Applicant after: Shanghai Energy Construction Group Co.,Ltd. Address before: 200122 No. 162, Weifang Road, Shanghai, Pudong New Area Applicant before: SHANGHAI MUNICIPAL GAS NO.2 PIPELINES ENGINEERING Co.,Ltd. |
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