CN105953246A - Air distribution bed material system for high-temperature slab dry cooling and conveying - Google Patents
Air distribution bed material system for high-temperature slab dry cooling and conveying Download PDFInfo
- Publication number
- CN105953246A CN105953246A CN201610406607.9A CN201610406607A CN105953246A CN 105953246 A CN105953246 A CN 105953246A CN 201610406607 A CN201610406607 A CN 201610406607A CN 105953246 A CN105953246 A CN 105953246A
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- Prior art keywords
- wind
- conveying
- air distribution
- bed material
- plate
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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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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J1/00—Removing ash, clinker, or slag from combustion chambers
- F23J1/02—Apparatus for removing ash, clinker, or slag from ash-pits, e.g. by employing trucks or conveyors, by employing suction devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J1/00—Removing ash, clinker, or slag from combustion chambers
- F23J1/06—Mechanically-operated devices, e.g. clinker pushers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
- F27D15/02—Cooling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
- F27D15/02—Cooling
- F27D15/0206—Cooling with means to convey the charge
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/15—Tapping equipment; Equipment for removing or retaining slag
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/15—Tapping equipment; Equipment for removing or retaining slag
- F27D3/1545—Equipment for removing or retaining slag
- F27D3/1554—Equipment for removing or retaining slag for removing the slag from the surface of the melt
- F27D3/1572—Equipment for removing or retaining slag for removing the slag from the surface of the melt by suction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D9/00—Cooling of furnaces or of charges therein
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D9/00—Cooling of furnaces or of charges therein
- F27D2009/007—Cooling of charges therein
- F27D2009/0072—Cooling of charges therein the cooling medium being a gas
- F27D2009/0075—Cooling of charges therein the cooling medium being a gas in direct contact with the charge
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Furnace Details (AREA)
Abstract
The invention provides an air distribution bed material system for high-temperature slab dry cooling and conveying. The system comprises an air chamber (9) at the bottom, the air chamber (9) can be communicated with the outside to introduce natural air or convey needed air through a draught fan, and a tank type air distribution system is arranged on the top of the air chamber (9). The tank type air distribution system comprises an air distribution plate (4), a plurality of air inlets are formed in the lower side of the air distribution plate (4), maze type air distribution units (1) are fixed to the air distribution plate (4), a U-type plate (3) is correspondingly arranged on a ventilation port formed by every two adjacent maze type air distribution units (1), a U-type opening of every U-type plate (3) covers the corresponding ventilation port formed by two adjacent maze type air distribution units (1), and a gap is reserved between every U-type plate (3) and two adjacent maze type air distribution units (1) to form an air flue. Thus, existing defects are overcome, and combustion of fuel in a boiler can be promoted more efficiently.
Description
Technical field
The present invention relates to the wind-distributing bed material system of a kind of high temperature furnace slag dry calibration and conveying, be specifically related to a kind of be applicable to power station, cement plant, the new-type high temperature furnace slag dry calibration of steel mill and the wind-distributing bed material system of conveying.
Background technology
The at present process of the dry slag of high temperature the most in the world, its equipment mainly uses steel band carry, and by natural wind cooling, this kind of equipment has a following deficiency:
1, high temperature furnace slag falls and is pulled away on steel band, still has to exit part high temperature furnace slag the most sufficiently cooled, causes steel band and to a certain degree damage.
2, steel band structure is complicated and weak, and steel plate hot is tired serious.
3, this kind of structure is limited by mentality of designing, and cost is higher, and reliability is on the low side, and fault rate is high.
In order to overcome above-mentioned deficiency, the present invention once provided one to be more suitable for coal-burning power plant's dry cooling high-temperatured slag and conveying system, specifically such as Fig. 1, shown in 2,3 in ZL 2006200129418.This dry cooling high-temperatured slag and conveying system, including seal casinghousing 00, pneumatic isolation door 01, promote beam type cooler 02, cooling blower 03, fluid power system 04, disintegrating machine 05, pipe type conveyer 06, slag storehouse 07 and operation monitoring system 08, beam type cooler is promoted to be made up of several combined unit, often group unit includes fixing pusher beam 10 and an activity pusher beam 09, and fixing pusher beam 10 and an activity pusher beam 09 are positioned at above stock supporting plate.Promote beam type cooler 02 driving activity pusher beam 09 to be operated, and be that interval promotes.Carry the slag of cooling finally by tubular belt conveyor, tubular belt conveyor is to close.
But, in this structure, in order to uniformly cool down, it usually needs each unit joins a Fans, and each cooling unit needs constant air input rate input quantity, input quantity size must be by showing on central operator, and the regulation of blower motor speed change or fans entrance executor is controlled by demodulator again, and demodulator receives the signal etc. from the airmeter on fan wind inleting tube again, air-flow input quantity just can be made to keep constant, complicated structure, cost is the highest, and fault rate is higher.
Therefore, there is the biggest obstacle in actual application, had a strong impact on it and promoted and use.
Summary of the invention
It is an object of the invention to the deficiency overcoming above two technology to exist, further, it is provided that a kind of cooling effect is more preferably and the wind-distributing bed material system of the high temperature furnace slag dry calibration of simple in construction and conveying.
The present invention is achieved through the following technical solutions:
A kind of wind-distributing bed material system of high temperature furnace slag dry calibration and conveying, described system is included in bottom and arranges an air compartment 9, described air compartment 9 can connect outside wind needed for introducing natural wind or being carried by blower fan, described air compartment 9 top arranges a slot type cloth wind system, described slot type cloth wind system includes air distribution plate 4, multiple air inlet is offered below described air distribution plate 4, labyrinth type cloth wind unit 1 it is further fixed on described air distribution plate 4, it is correspondingly arranged U-shaped plate 3 above the vent of the formation of the labyrinth type cloth wind unit 1 that said two is adjacent, the U-shaped mouth of described U-shaped plate 3 covers the vent of the formation of the adjacent labyrinth type cloth wind unit 1 of said two, and leave gap to form air channel between the labyrinth type cloth wind unit 1 that described U-shaped plate 3 is adjacent with said two.
Preferably, described slot type cloth wind system also includes that some promotions excellent 7, described promotion are fixed with a briquetting 8 on rod 7, and described promotion excellent 7 is provided below a driving plate 5, and described driving plate 5 drives described briquetting 8, thus drives described promotion rod 7 to move back and forth.
It is further preferred that described adjacent promotion between rod 7 also sets up several fixing scraping wings 12.
Preferably, described fixing scraping wings 12 is wedge shape.
Rod 7 is promoted to be arranged to wedge shape promotion rod 13 it is further preferred that described.
It is further preferred that be provided with multiple vent on described air distribution plate 4 according to actual needs, and described labyrinth type cloth wind unit 1 end, is by screw, nut 16,17 fixed installations such as grade.
It is further preferred that the ventilation air duct that described labyrinth type cloth wind unit 1 and described U-shaped plate 3 are formed covers the vent to described air distribution plate 4.
Additionally, the present invention is further preferred, whole new-type wind-distributing bed material system is to be embedded in described air distribution plate 4 by multiple independent described labyrinth type cloth wind unit 1, and an overall labyrinth type air distribution plate system 15 of composition is uniform-distribution with water cooling tube 6 often arranging between described labyrinth type cloth wind unit 1.
Further, when the present invention is provided with described fixed promotion plate 12 and described wedge shape promotion excellent 13 simultaneously, wedge shape described in fixed promotion plate 12 described in one row and a row promotes rod 13 to be arranged alternately on the system, wherein, described wedge shape promotes rod 13 to be connected to driving means by described driving plate 5, this driving means can be the use of the guide rail of band ball and be driven by hydraulic cylinder unit 11, thus drive described wedge shape to promote rod 13 to move back and forth, during material is promoted translation, obstruction due to described fixed promotion plate 12, overturn again, thus the high-temperature material of material bed inside is turned to above, overturn back and forth.
Promoting rod 7 to be fixed on described driving plate 5 by described briquetting 8 it addition, described, described briquetting 8 primarily serves and promotes rod 7 to fix, drive the effect driven to described.In described briquetting 8 is fixed on the installation of described driving plate 5, described briquetting 8 can be fixed with chock.Chock only need to be got by the described replacing promoting rod 7 with hammer, it is possible to removes described promotion rod 7.
It addition, the present invention is it is further preferred that whole wind-distributing bed material system and horizontal plane have certain inclination angle as shown in Figure 8, the most advantageously move forward in slag charge.
The present invention using above technical scheme has the following advantages:
First, the present invention improves original structure, it is provided that a kind of can preferably blow and the new-type wind-distributing bed material system of simple in construction.
2. secondly, the present invention installs machinery perturbed system above Novel ventilating device additional, by several fixing scraping wings and the movable mobile unit promoting rod to become, can make material turning.So, by making material move back and forth and not stop to stir, the continual reciprocating motion making material bed inside do fore-and-aft direction and stirring, thus increase material particles gap, making blower fan power consumption reduce, make the ventilative rate of material increase, conveying cooling effect is more fully efficiently.And material will not be stagnated or overstocks.
3. high pressure positive blower continues through the air compartment of boiler bottom and is blown into air, and the device provided by the present invention, i.e. by being blown into boiler material above with mazy ventilation air duct, so air intake is flat, do not have resistance or resistance the least after forward direction, overcome original defect, significantly more efficient can promote conveying cooling effect.
Accompanying drawing explanation
The overview of Fig. 1 existing high temperature furnace slag dry calibration conveyer device.
The top view of Fig. 2 existing high temperature furnace slag dry calibration conveyer device.
The schematic diagram that Fig. 3 present invention new-type wind-distributing bed material system is overall.
The partial enlarged drawing of Fig. 4 present invention new-type wind-distributing bed material system.
The fixing connection diagram of the labyrinth type cloth wind unit of Fig. 5 present invention new-type wind-distributing bed material system.
Fig. 6 present invention new-type wind-distributing bed material system comprises the schematic diagram of fixed and movable scraping wings.
Fig. 7 present invention new-type wind-distributing bed material system comprises the schematic diagram of water cooling tube.
The schematic diagram that Fig. 8 present invention new-type wind-distributing bed material system preferred angled is arranged.
Detailed description of the invention
Below, dependency structure and the operation principle of the present invention new-type wind-distributing bed material system is specifically described in detail in conjunction with accompanying drawing 3-8.
A kind of wind-distributing bed material system of high temperature furnace slag dry calibration and conveying, described system is included in bottom and arranges an air compartment 9, described air compartment 9 can connect outside wind needed for introducing natural wind or being carried by blower fan, described air compartment 9 top arranges a slot type cloth wind system, described slot type cloth wind system includes air distribution plate 4, multiple air inlet is offered below described air distribution plate 4, labyrinth type cloth wind unit 1 it is further fixed on described air distribution plate 4, it is correspondingly arranged U-shaped plate 3 above the vent of the formation of the labyrinth type cloth wind unit 1 that said two is adjacent, the U-shaped mouth of described U-shaped plate 3 covers the vent of the formation of the adjacent labyrinth type cloth wind unit 1 of said two, and leave gap to form air channel between the labyrinth type cloth wind unit 1 that described U-shaped plate 3 is adjacent with said two.
Preferably, described slot type cloth wind system also includes that some promotions excellent 7, described promotion are fixed with a briquetting 8 on rod 7, and described promotion excellent 7 is provided below a driving plate 5, and described driving plate 5 drives described briquetting 8, thus drives described promotion rod 7 to move back and forth.
It is further preferred that described adjacent promotion between rod 7 also sets up several fixing scraping wings 12.
Preferably, described fixing scraping wings 12 is wedge shape.
Rod 7 is promoted to be arranged to wedge shape promotion rod 13 it is further preferred that described.
It is further preferred that be provided with multiple vent on described air distribution plate 4 according to actual needs, and described labyrinth type cloth wind unit 1 end, is by screw, nut 16,17 fixed installations such as grade.
It is further preferred that the ventilation air duct that described labyrinth type cloth wind unit 1 and described U-shaped plate 3 are formed covers the vent to described air distribution plate 4.
Additionally, the present invention is further preferred, whole new-type wind-distributing bed material system is to be embedded in described air distribution plate 4 by multiple independent described labyrinth type cloth wind unit 1, and an overall labyrinth type air distribution plate system 15 of composition is uniform-distribution with water cooling tube 6 often arranging between described labyrinth type cloth wind unit 1.
Further, when the present invention is provided with described fixed promotion plate 12 and described wedge shape promotion excellent 13 simultaneously, wedge shape described in fixed promotion plate 12 described in one row and a row promotes rod 13 to be arranged alternately on the system, wherein, described wedge shape promotes rod 13 to be connected to driving means by described driving plate 5, this driving means can be the use of the guide rail of band ball and be driven by hydraulic cylinder unit 11, thus drive described wedge shape to promote rod 13 to move back and forth, during material is promoted translation, obstruction due to described fixed promotion plate 12, overturn again, thus the high-temperature material of material bed inside is turned to above, overturn back and forth.
Promoting rod 7 to be fixed on described driving plate 5 by described briquetting 8 it addition, described, described briquetting 8 primarily serves and promotes rod 7 to fix, drive the effect driven to described.In described briquetting 8 is fixed on the installation of described driving plate 5, described briquetting 8 can be fixed with chock.Chock only need to be got by the described replacing promoting rod 7 with hammer, it is possible to removes described promotion rod 7.
It addition, the present invention is it is further preferred that whole wind-distributing bed material system and horizontal plane have certain inclination angle as shown in Figure 8, the most advantageously move forward in slag charge.
During work, high pressure positive blower the air compartment continuing through bottom is blown into air.Air in air compartment is with certain pressure, by the air inlet of the slot type cloth wind system of bottom, enters mazy air channel to be blown into material above.And make in material conveying process, it is embedded in roll-over unit and the mobile unit of material bed inside, i.e. fixing scraping wings 12 and promote rod 7 under the hydraulic cylinder unit 11 air compartment within drives, the continual reciprocating motion doing fore-and-aft direction in material bed inside and stirring is moved to stir material.Increase material particles gap, make blower fan power consumption reduce, and make material to stagnate or overstock to prevent blocking and increase conveying cooling effect.
The translational speed of material depends on the motion frequency of hydraulic cylinder and the flow behavior of material, and hydraulic cylinder can be by PID regulator control, and parameter sets according to entrance air compartment blast.At air quantity balancer, pressure declines, and actuator reduces movable rod speed, otherwise accelerates excellent 7 speed of described promotion.
Claims (11)
1. a wind-distributing bed material system for high temperature furnace slag dry calibration and conveying, described system is included in bottom and arranges an air compartment (9),
Described air compartment (9) can connect outside wind needed for introducing natural wind or being carried by blower fan, and described air compartment (9) top is arranged
One slot type cloth wind system, described slot type cloth wind system includes that air distribution plate (4), described air distribution plate offer multiple air inlet below (4),
Labyrinth type cloth wind unit (1) it is further fixed on described air distribution plate (4), labyrinth type cloth wind unit (1) that said two is adjacent
Being correspondingly arranged U-shaped plate (3) above the vent formed, the U-shaped mouth of described U-shaped plate (3) covers the fan that said two is adjacent
The vent of the formation in palace formula cloth wind unit (1), and the labyrinth type cloth wind list that described U-shaped plate (3) is adjacent with said two
Gap is left to form air channel between unit (1).
2. high temperature furnace slag dry calibration as claimed in claim 1 and the wind-distributing bed material system of conveying, wherein said slot type cloth wind system
Also including that some rods (7) that promotes, described promotion are fixed with a briquetting (8) on rod (7), described promotion rod (7) is provided below
There are a driving plate (5), described driving plate (5) to drive described briquetting (8), thus drive described promotion rod (7) to move back and forth.
3. high temperature furnace slag dry calibration as claimed in claim 2 and the wind-distributing bed material system of conveying, wherein said adjacent promotion rod (7)
Several fixing scraping wings (12) are also set up between.
4. high temperature furnace slag dry calibration as claimed in claim 3 and the wind-distributing bed material system of conveying, wherein said fixing scraping wings (12)
It it is wedge shape.
5. high temperature furnace slag dry calibration as claimed in claim 2 and the wind-distributing bed material system of conveying, wherein said promotion rod (7) sets
It is set to wedge shape and promotes rod (13).
6. high temperature furnace slag dry calibration as claimed in claim 1 and the wind-distributing bed material system of conveying, wherein in described air distribution plate (4)
On be provided with multiple vent, and described labyrinth type cloth wind unit (1) end, is fixedly mounted by screw, nut (16,17).
7. high temperature furnace slag dry calibration as claimed in claim 1 and the wind-distributing bed material system of conveying, wherein said labyrinth type cloth wind list
The ventilation air duct that unit (1) and described U-shaped plate (3) are formed covers the vent to described air distribution plate (4).
8. high temperature furnace slag dry calibration as claimed in claim 1 and the wind-distributing bed material system of conveying, wherein said system is by multiple
Independent described labyrinth type cloth wind unit (1) is embedded in described air distribution plate (4), an overall labyrinth type air distribution plate system of composition
(15), it is uniform-distribution with water cooling tube (6) between described labyrinth type cloth wind unit (1) often arranging.
9. high temperature furnace slag dry calibration as claimed in claim 5 and the wind-distributing bed material system of conveying, be provided with described solid the most simultaneously
When fixed pattern promotes plate (12) and described wedge shape to promote rod (13), wedge described in fixed promotion plate (12) described in a row and a row
Shape promotes rod (13) to be arranged alternately on the system, and wherein, described wedge shape promotes rod (13) by described driving plate (5)
Being connected to driving means, this driving means is the guide rail of band ball and is driven by hydraulic cylinder unit (11), thus drives described wedge
Shape promotes rod (13) to move back and forth.
10. high temperature furnace slag dry calibration as claimed in claim 2 and the wind-distributing bed material system of conveying, wherein said promotion rod (7)
It is fixed on described driving plate (5) by fixing described briquetting (8) with chock.
11. high temperature furnace slag dry calibration as claimed in claim 2 and the wind-distributing bed material system of conveying, the most whole described wind-distributing bed
Material system and horizontal plane have certain inclination angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610406607.9A CN105953246B (en) | 2016-06-08 | 2016-06-08 | High temperature furnace slag dry calibration and the wind-distributing bed material system of conveying |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610406607.9A CN105953246B (en) | 2016-06-08 | 2016-06-08 | High temperature furnace slag dry calibration and the wind-distributing bed material system of conveying |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105953246A true CN105953246A (en) | 2016-09-21 |
| CN105953246B CN105953246B (en) | 2018-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610406607.9A Active CN105953246B (en) | 2016-06-08 | 2016-06-08 | High temperature furnace slag dry calibration and the wind-distributing bed material system of conveying |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0811804A2 (en) * | 1996-06-04 | 1997-12-10 | MARTIN GmbH für Umwelt- und Energietechnik | Grate element and grate for incinerators |
| CN201028544Y (en) * | 2006-04-06 | 2008-02-27 | 韩永胜 | High-temperature furnace slag dry cooling and conveying system |
| CN202420212U (en) * | 2012-01-06 | 2012-09-05 | 唐山盾石筑炉工程有限责任公司 | Sealing device for high-efficiency cooler |
| CN202420211U (en) * | 2012-01-06 | 2012-09-05 | 唐山盾石筑炉工程有限责任公司 | Ventilation device of high-efficiency cooler |
| CN204388076U (en) * | 2014-12-12 | 2015-06-10 | 华西能源工业股份有限公司 | CFB garbage burning boiler burner hearth |
| CN205939185U (en) * | 2016-06-08 | 2017-02-08 | 青岛德施普工程技术有限公司 | Cooling of high temperature slag dry -type and cloth wind bed material system that carries |
-
2016
- 2016-06-08 CN CN201610406607.9A patent/CN105953246B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0811804A2 (en) * | 1996-06-04 | 1997-12-10 | MARTIN GmbH für Umwelt- und Energietechnik | Grate element and grate for incinerators |
| CN201028544Y (en) * | 2006-04-06 | 2008-02-27 | 韩永胜 | High-temperature furnace slag dry cooling and conveying system |
| CN202420212U (en) * | 2012-01-06 | 2012-09-05 | 唐山盾石筑炉工程有限责任公司 | Sealing device for high-efficiency cooler |
| CN202420211U (en) * | 2012-01-06 | 2012-09-05 | 唐山盾石筑炉工程有限责任公司 | Ventilation device of high-efficiency cooler |
| CN204388076U (en) * | 2014-12-12 | 2015-06-10 | 华西能源工业股份有限公司 | CFB garbage burning boiler burner hearth |
| CN205939185U (en) * | 2016-06-08 | 2017-02-08 | 青岛德施普工程技术有限公司 | Cooling of high temperature slag dry -type and cloth wind bed material system that carries |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105953246B (en) | 2018-03-20 |
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