CN109626664B - Integrated stacked water purifying device - Google Patents
Integrated stacked water purifying device Download PDFInfo
- Publication number
- CN109626664B CN109626664B CN201910107748.4A CN201910107748A CN109626664B CN 109626664 B CN109626664 B CN 109626664B CN 201910107748 A CN201910107748 A CN 201910107748A CN 109626664 B CN109626664 B CN 109626664B
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- Prior art keywords
- filter
- plate
- tank
- zone
- water purification
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- 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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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 93
- 238000001914 filtration Methods 0.000 claims abstract description 43
- 238000004062 sedimentation Methods 0.000 claims abstract description 34
- 238000005189 flocculation Methods 0.000 claims abstract description 25
- 230000016615 flocculation Effects 0.000 claims abstract description 25
- 239000006228 supernatant Substances 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 18
- 238000007789 sealing Methods 0.000 claims description 18
- 238000009826 distribution Methods 0.000 claims description 14
- 238000000746 purification Methods 0.000 claims description 13
- 238000005192 partition Methods 0.000 claims description 9
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 8
- 238000001556 precipitation Methods 0.000 description 7
- 239000010865 sewage Substances 0.000 description 7
- 239000013049 sediment Substances 0.000 description 5
- 239000010802 sludge Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 210000005056 cell body Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000010840 domestic wastewater Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention discloses an integrated stacked water purifying device which comprises a flocculation tank and a water purifying tank, wherein the water purifying tank comprises a tank body, a sedimentation zone arranged on the tank body and a filtering zone arranged on the tank body, and the sedimentation zone is positioned above the filtering zone; the sedimentation zone is provided with a pipeline for conveying the supernatant to the filtering zone. The sedimentation zone is arranged above the filtering zone, so that the occupied area of the water purifying pool is small, more ground can be used for installing other equipment, the sedimentation zone can be used in smaller water treatment plants, the large water treatment plant quantity is ensured, the cost is low, and the water treatment capacity is good.
Description
Technical Field
The invention belongs to the technical field of water treatment, and particularly relates to an integrated stacked water purifying device.
Background
In the process of treating industrial wastewater or domestic wastewater, water body is required to be treated through flocculation, precipitation and filtration, at present, in the process of treating water, precipitation and filtration are required to be carried out on the water body separately, an existing water purifying device is generally provided with a precipitation tank on the ground, then a filter tank is arranged side by side, then the water body in the precipitation tank is led into the filter tank through a pipeline, but because the volume ratio of the precipitation tank and the filter tank is large, the occupied area is large, a large amount of space is required to set the precipitation tank and the filter tank, the waste of land can be caused, the waste cannot be reasonably utilized, and in addition, for some small-sized water treatment plants, the setting mode can only be realized by setting the precipitation tank and the filter tank to be small, the water amount for treatment in unit time is small, the water treatment efficiency is low, and the water treatment cost is high.
Disclosure of Invention
The invention provides an integrated stacked water purifying device with small occupied area, which aims to overcome the defects of the prior art.
In order to achieve the above purpose, the present invention adopts the following technical scheme: an integrated stacked water purification device comprises a flocculation tank and a water purification tank, wherein the water purification tank comprises a tank body, a sedimentation zone arranged on the tank body and a filtering zone arranged on the tank body, and the sedimentation zone is positioned above the filtering zone; the sedimentation zone is positioned above the filtration zone; the sedimentation zone is provided with a pipeline for conveying the supernatant to the filtering zone.
According to the invention, the filtering area and the sedimentation area are arranged in the clean water tank, the sedimentation area is arranged above the filtering area, the occupied area of the clean water tank is small in the process of installing the clean water tank, more ground can be used for installing other equipment, and the occupied space of the clean water tank is reduced, so that the clean water tank can be used in a smaller water treatment plant, the water treatment capacity of the water treatment plant can be ensured to be larger, the cost is low, and the water treatment capacity is good.
Preferably, an inclined plate component is arranged in the sedimentation zone; the inclined plate component can filter out sludge in sewage, so that dirt is reduced from entering the filter tank.
Preferably, the filtering area is internally provided with a filtering material, a filter plate assembly for supporting the filtering material and a cover body covered on the filter plate assembly, and the pipeline is connected with the cover body; through setting up the cover body can avoid flowing to the filter material through the clear water after filtering, avoid clear water and sewage to because the setting of the cover body, the space on its usable cover body upper portion is as the region of accepting clear water, and it has effectively improved clear water treatment's efficiency, has reduced the height of clean water reservoir, has ensured the stability of clean water reservoir in the use, has reduced the cost of whole clean water reservoir.
Preferably, a drain pipe for supplying water to flow out of the filtering area is arranged in the filtering area, and the inlet end of the drain pipe is positioned above the cover body; through establishing the cover body top with the water inlet, can avoid the cover body to influence water overflow in the middle of the delivery port to this setting method can improve the volume that can hold clear water in the filtration district as far as possible.
Preferably, a partition board is arranged in the tank body so that the tank body is divided into the sedimentation area and the filtration area; through setting up the baffle and can divide into two regions with a cell body, its simple to operate can realize distinguishing fast.
Preferably, a sedimentation concave part is arranged on the partition board; sediment can be conveniently deposited and gathered together through setting up the sediment concave part, and then the sediment of being convenient for is discharged in the middle of the mud pipe.
Preferably, a plurality of flocculation plates which are longitudinally arranged are arranged in the flocculation tank; through the setting of flocculation board, can reduce the water flow rate, ensure that the water can be better in the flow process flocculate, improved the flocculation effect.
Preferably, the filter plate assembly includes
A filter plate;
a base plate connected to the filter plate;
a plurality of ridges formed by deformation of the filter sheet;
a first seal plate mated with the front side of the filter plate;
a second seal plate mated to the rear side of the filter plate;
the inner wall of the ridge, the upper surface of the bottom plate, the side wall of the first sealing plate and the side wall of the second side plate are surrounded to form a sealed cavity;
the convex ridge is provided with a plurality of filtering holes for medium to flow into/out of the cavity, and the bottom plate is provided with a plurality of through holes for medium to flow out of/into the cavity;
the filter plate is provided with the convex ridges and the filter holes are formed in the convex ridges, so that the traditional mode of installing the filter head on the filter plate is replaced, and the filter head is not required to be installed when the filter plate is installed, and therefore the installation process is simplified, the working strength of workers is reduced on the one hand, the installation efficiency of the filter plate is improved on the other hand, the construction period is shortened, and the installation cost is reduced; the filter head is not needed, the manufacturing cost is reduced, only the filter plate is required to be maintained, the cost required by maintenance is reduced, and the economy is reflected; meanwhile, the filter holes are directly arranged on the convex ridge, and the gap between two adjacent filter holes can be designed, so that the water inlet process is more uniform and reasonable, and the water inlet process is more direct in the process of air distribution and water distribution back flushing, and the flushing effect is better; the filter plate has high structural strength, can not be damaged during use, can avoid filter materials from entering clear water, ensures that water bodies are not subjected to secondary pollution after being filtered by the filter tank, and ensures water quality.
Preferably, an overflow pipe is arranged in the flocculation tank; the setting through the overflow pipe can avoid in the middle of the flocculation basin when the pipeline is plugged up, and the water can be discharged in the middle of the overflow pipe, avoids the water to flow to the ground from flowing out in the middle of the flocculation basin and avoids the water extravagant.
Preferably, the tank body is of a stainless steel structure; the stainless steel structure has high strength and high forming speed, and can be installed according to the preset size, so that the construction period of the clean water tank is short, and quick installation and forming can be realized.
In summary, the sedimentation zone is arranged above the filtering zone, so that the occupied area of the water purifying pool is small, more ground can be emptied for installing other equipment, the sedimentation zone can be used in smaller water treatment plants, the large water treatment plants are ensured, the cost is low, and the water treatment capacity is good.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic view of a partial structure of the present invention.
Fig. 3 is an enlarged view of a in fig. 2.
Fig. 4 is a schematic view of the structure of the filter plate assembly of the present invention.
Fig. 5 is a partial cross-sectional view of a filter plate assembly of the present invention.
Fig. 6 is a schematic view of the structure of the filter rod of the present invention.
Detailed Description
In order to enable those skilled in the art to better understand the present invention, the following description will make clear and complete descriptions of the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention.
As shown in fig. 1-6, an integrated stacked water purifying device comprises a flocculation tank 1 and a clean water tank 2, wherein the clean water tank 2 comprises a tank body 21, a sedimentation zone 22 and a filtration zone 23, the tank body 21 is a stainless steel structure tank, a partition plate 26 is arranged in the middle of the tank body 21, the partition plate 26 is a metal plate, the space inside the tank body 21 is divided into two sections of the sedimentation zone 22 and the filtration zone 23 by the partition plate 26, the sedimentation zone 22 is positioned above the filtration zone 23, a plurality of sloping plate components 24 are arranged in the sedimentation zone 22, and the sloping plate components 24 are sedimentation components described in the chinese patent CN103495292B, which are the prior art, and therefore are not described in detail herein; a sedimentation concave part 31 is arranged on the partition board 26, sediment in sewage can fall into the sedimentation concave part 31, and the sedimentation concave part 31 is formed by punching the partition board 26; a plurality of sludge discharge pipes 210 are disposed on the side wall of the tank body 21, the number of the sludge discharge pipes 210 is identical to the number of the sedimentation recesses 31, and the open ends of the sludge discharge pipes 210 are located in the sedimentation recesses 31, so that the sediment in the sedimentation recesses 31 can be discharged through the sludge discharge pipes 210, specifically in a manner of being sucked away by negative pressure.
Further, the filtering area 23 is an area below the partition board, and a filter plate assembly 232, a filter material 231 and a cover 234 are arranged in the filtering area, wherein the filter material 231 is a filter material for filtering sewage in the market at present, the filter material is a filter material in the prior art, the cover 234 is a metal cover, the cover 234 covers the filter material 231 in the cover 234, and the cover 234 supports the filter plate assembly 232; the combination of the cover 234 and the filter plate assembly 232 further divides the filtering area 23 into a clean water area and a sewage area, wherein the sewage area is a space enclosed by the cover 234 and the filter plate assembly 232, and the clean water area is a space on the filtering area for removing the sewage area; the cover 234 is connected with a water inlet pipe 28, the water inlet pipe 28 is a metal pipeline, and the water passing through the inclined plate writing component flows into the cover through the water inlet pipe 28 and is filtered by a filter material 231.
Meanwhile, a drain pipe 25 is arranged on the filtering area 23, the drain pipe 25 is used for draining filtered clean water out of the tank body, and the inlet end of the drain pipe 25 is positioned above the cover body, so that the filtered water body overflows to the upper part of the cover body 234 and then enters the drain pipe from the inlet end of the drain pipe 25, and is discharged out of the tank body; meanwhile, a manhole 27 is arranged on the tank body, and the filtering material 231 can be directly observed through the manhole 27.
Specifically, the filter plate assembly includes a filter plate 31, a bottom plate 32, a first sealing plate 351, a second sealing plate 352, a plurality of ridges 33, and cavities 34; the filter plate 31 is a stainless steel metal plate, and the lower end of the cover body is connected with the filter plate 31 in a sealing way; the bottom plate 32 and the filter plate 31 are welded together in a seamless manner, the bottom plate 32 is a stainless steel metal plate, the width of the bottom plate is basically consistent with the width of the whole filter plate 31, and the bottom plate 32 and the bottom of the filter plate 31 are positioned on the same plane; the ridge 33 is formed by upwardly protruding the filter plate 31, but it is needless to say that the ridge may be formed by downwardly pressing the filter plate 31, and the ridge 33 has a trapezoid shape; the first sealing plate 351 is welded to the front sides of the filter plate 31 and the bottom plate 32, and the second sealing plate 352 is welded to the rear sides of the filter plate 31 and the bottom plate 32; because the filter plate 31 is formed so that a certain space is reserved between the bottom plate 32 and the filter plate 31, the inner wall of the ridge 33, the upper surface of the bottom plate 32, the side wall of the first sealing plate 351 and the side wall of the second sealing plate 352 enclose a closed cavity 34; the number of the filter plates 31 is n, wherein n is more than or equal to 2, the number of the first sealing plates is a, and the relation between the number of the first sealing plates and the number of the filter plates 31 is 1-a-n; meanwhile, the number of the second sealing plates is b, and the number relation between the number of the filter plates 31 and the number of the second sealing plates is 1-b-n.
Further, a plurality of filtering holes 36 are formed on the side wall of the ridge 33, the filtering holes 36 are communicated with the cavity 34, and when water is filtered, the water enters the cavity 34 through the filtering holes 36; at the same time, when the filter material is backwashed, water entering the cavity 34 flows out of the cavity through the filter holes 36 to backwashed the filter material; the bottom plate 32 is provided with a through hole 37, water in the cavity 34 flows into the filter tank through the through hole 37, and simultaneously, when the filter material is backwashed, the air-water mixture on the filter rod flows into the cavity 34 through the through hole 37.
The filter plate assembly further comprises a first connecting structure and a second connecting structure, wherein the first connecting structure is a first screw hole 3511 formed in the first sealing plate 351, and the second connecting structure is a second screw hole 3521 formed in the second sealing plate 352; in other embodiments, the first connection structure may be another metal piece welded to the filter plate or the base plate, and the second connection structure may be another metal piece welded to the filter plate or the base plate.
Further, the support structure includes a cross beam 331 and a filter rod 332, the cross beam 331 and the filter rod 332 are made of metal, the cross beam 331 is provided with a gas distribution groove 3310, the gas distribution groove 3310 is a groove, and the cross beam corresponds to the position of the through hole 37, so that water flowing out of the through hole 37 flows into the gas distribution groove 3310; each cross beam 331 is connected to two filter rods 332 upwards, and a chamber 3320 is arranged on each filter rod 332, and the chamber 3320 is communicated with the air distribution groove 3310, so that water in the air distribution groove 3310 flows into the chamber 3320; a plurality of openings 3321 are arranged at the lower part of the filter rod, the openings 3321 can be round holes, bar-shaped holes, square holes and the like, and water entering the cavity 3320 flows out of the openings 3321; simultaneously, the backwashed air-water mixture enters the cavity 3320 through the opening 3321 and then flows out through the through hole 37, the cavity 34 and the filter holes 36 in sequence, so that the filter material is backwashed; an air distribution port 3322 is provided at the upper portion of the filter rod 332, and air in the tank 31 can enter the air distribution groove 3310 through the air distribution port 3322.
Further, a fixing piece 311 is pre-buried at the bottom of the tank body 31, the fixing piece 311 is a metal piece fixed in the tank body 31, and the lower end of the filter rod 332 is welded with the lower part of the fixing piece 311.
Specifically, the flocculation tank 1 is arranged at one side of the water purification tank 2, the flocculation tank 2 is also a metal tank, a flocculation plate 11 is arranged in the flocculation tank 1, the flocculation plate 11 is a metal plate, the flocculation plate 11 is in a flat-laid mode, an overflow pipe 12 is arranged in the flocculation tank 1, the overflow pipe 12 is a metal pipe, an upper end opening of the overflow pipe 12 is positioned at the upper part of the flocculation tank 2, and the overflow pipe 11 is communicated with other tanks; meanwhile, the water in the flocculation tank 1 flows into the sedimentation tank area after flocculation, and then is discharged into the cover 234 for filtering treatment through a pipeline after passing through the sloping plate component 24.
It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
Claims (8)
1. An integrated stacked water purification device comprises a flocculation tank (1) and a water purification tank (2), and is characterized in that: the clean water tank (2) comprises a tank body (21), a sedimentation zone (22) and a filtering zone (23), wherein the sedimentation zone (22) is positioned above the filtering zone (23); a pipeline (28) for conveying the supernatant to the filtering area (23) is arranged on the sedimentation area (22);
a filter material (231), a filter plate assembly (232) for supporting the filter material (231) and a cover body (234) covered on the filter plate assembly (232) are arranged in the filter area (23), and the pipeline (28) is connected with the cover body (234);
the filter plate assembly (232) includes
A filter plate (31);
a bottom plate (32) connected to the filter sheet (31);
a plurality of ridges (33) formed by deformation of the filter sheet (31);
a first sealing plate which is matched with the front side of the filter plate (31);
a second sealing plate which is matched with the rear side of the filter plate (31);
a sealed cavity (34) is formed by the inner wall of the ridge (33), the upper surface of the bottom plate (32), the side wall of the first sealing plate and the side wall of the second sealing plate in a surrounding mode;
the ridge (33) is provided with a plurality of filtering holes (36) for medium to flow into/out of the cavity (34), and the bottom plate (32) is provided with a plurality of through holes (37) for medium to flow out of/into the cavity (34);
the filter plate assembly comprises a cross beam (331) and filter rods (332), wherein an air distribution groove (3310) is formed in the cross beam (331), the air distribution groove (3310) is a groove, two filter rods (332) are connected to each cross beam (331) in an upward mode at positions corresponding to the through holes (37), a cavity (3320) is formed in each filter rod (332), the cavity (3320) is communicated with the air distribution groove (3310), a plurality of openings (3321) are formed in the lower portion of each filter rod, and air distribution openings (3322) are formed in the upper portion of each filter rod (332);
the bottom of the tank body (21) is provided with a pre-buried fixing piece (311), and the lower end of the filter rod (332) is welded with the lower part of the fixing piece (311).
2. The integrated stacked water purification apparatus of claim 1, wherein: an inclined plate component (24) is arranged in the sedimentation zone (22).
3. The integrated stacked water purification apparatus of claim 1, wherein: a drain pipe (25) for supplying water to flow out of the filtering area (23) is arranged in the filtering area (23), and the inlet end of the drain pipe (25) is positioned above the cover body (234).
4. The integrated stacked water purification apparatus of claim 1, wherein: a baffle plate (26) is arranged in the tank body so that the tank body (21) is divided into a sedimentation zone (22) and a filtration zone (23).
5. The integrated stacked water purification apparatus of claim 4, wherein: a sedimentation concave part (261) is arranged on the partition plate (26).
6. The integrated stacked water purification apparatus of claim 1, wherein: a plurality of flocculation plates (11) which are longitudinally arranged are arranged in the flocculation tank (1).
7. The integrated stacked water purification apparatus of claim 1, wherein: an overflow pipe (12) is arranged in the flocculation tank (1).
8. The integrated stacked water purification apparatus of claim 1, wherein: the tank body (21) is of a stainless steel structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910107748.4A CN109626664B (en) | 2019-02-01 | 2019-02-01 | Integrated stacked water purifying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910107748.4A CN109626664B (en) | 2019-02-01 | 2019-02-01 | Integrated stacked water purifying device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109626664A CN109626664A (en) | 2019-04-16 |
| CN109626664B true CN109626664B (en) | 2024-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910107748.4A Active CN109626664B (en) | 2019-02-01 | 2019-02-01 | Integrated stacked water purifying device |
Country Status (1)
| Country | Link |
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| CN (1) | CN109626664B (en) |
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|---|---|---|---|---|
| CN1657134A (en) * | 2004-02-20 | 2005-08-24 | 深圳市清泉水系统工程设备有限公司 | Reverse filtering air water back flushing filtering pond and reverse filtering air water back flushing method |
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| CN205892932U (en) * | 2016-07-26 | 2017-01-18 | 江苏泰源环保科技股份有限公司 | Integrated water purifier |
| WO2017088824A1 (en) * | 2015-09-25 | 2017-06-01 | 上海凡清环境工程有限公司 | Integrated organism filter sewage treatment apparatus |
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| CN209974461U (en) * | 2019-02-01 | 2020-01-21 | 浙江联池水务设备股份有限公司 | Integrated stacked water purifier |
-
2019
- 2019-02-01 CN CN201910107748.4A patent/CN109626664B/en active Active
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| CN1657134A (en) * | 2004-02-20 | 2005-08-24 | 深圳市清泉水系统工程设备有限公司 | Reverse filtering air water back flushing filtering pond and reverse filtering air water back flushing method |
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| WO2017088824A1 (en) * | 2015-09-25 | 2017-06-01 | 上海凡清环境工程有限公司 | Integrated organism filter sewage treatment apparatus |
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| CN109626664A (en) | 2019-04-16 |
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Address after: Room 407, building 18, No. 998, Wenyi West Road, Yuhang District, Hangzhou City, Zhejiang Province 310000 Applicant after: ZHEJIANG LIANCHI WATER EQUIPMENT STOCK Co.,Ltd. Address before: Room 413, building 2, 1500 Wenyi West Road, Yuhang District, Hangzhou City, Zhejiang Province 310000 Applicant before: ZHEJIANG LIANCHI WATER EQUIPMENT STOCK Co.,Ltd. |
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