TW426552B - Method and device for manufacturing metal strip - Google Patents

Method and device for manufacturing metal strip Download PDF

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Publication number
TW426552B
TW426552B TW087102597A TW87102597A TW426552B TW 426552 B TW426552 B TW 426552B TW 087102597 A TW087102597 A TW 087102597A TW 87102597 A TW87102597 A TW 87102597A TW 426552 B TW426552 B TW 426552B
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TW
Taiwan
Prior art keywords
steel strip
galvanized
forged
eroded
cold
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TW087102597A
Other languages
Chinese (zh)
Inventor
Wilfried Bald
Klaus Klamma
Hartmut Neuer
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Sms Scholoemann Siemag Aktieng
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C23C2/024—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by cleaning or etching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/28—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by cold-rolling, e.g. Steckel cold mill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
    • B05C3/02—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material
    • B05C3/12—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating work of indefinite length
    • B05C3/125—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating work of indefinite length the work being a web, band, strip or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/002—Pretreatement
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/06—Zinc or cadmium or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
    • C23C2/36—Elongated material
    • C23C2/40—Plates; Strips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B2001/228—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length skin pass rolling or temper rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B2015/0071—Levelling the rolled product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
    • B21B45/06—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing of strip material

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating With Molten Metal (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Metal Rolling (AREA)
  • Electroplating Methods And Accessories (AREA)

Abstract

This invention relates to a method and device. If the rolled strip (2) is continuously and successively pickled, cold-rolled and coated with zinc in a continuous production line (1), high quality metal strip can be manufactured faster and cheaper.

Description

經消部中央楛隼局幻工消费合作.^印54 4 265 5 2 Λ 7 Β7 五、發明説明（i ) 本發明關於一種製造冷鍛、鍍鋅及侵蝕的金屬帶的方 法與設備*由一種熱鍛鋼帶起始*它首先作侵蝕（酸洗） ，然後冷鍛，然後鍍鋅，它具有分離的或耦合到該侵蝕級 (Beize)上的冷鍛機，以將一種高溫鏟鋅設備將此冷鍛鋼帶 回火及鍍覆β 爲了製造冷鍛鍍鋅的鋼帶，在背景技術中已知將一條 熱鍛前鋼帶在一侵蝕線上作侵蝕。這種侵蝕作業一方面用 於把熱鍛時產生的綉垢層溶解掉，另一方面把鋼帶上形成 的氧化層除掉。然後將該侵蝕過的熱鋼帶在一冷鍛機上以 一種厚度作變形，以達到所要的完工厚度，一般在1 ™以 下。在冷鍛程序後，將此捲成束捲(Bund)的鋼帶回火並鍍 覆，例如在一高溫鍍鋅設備中。 這種鋼帶處理程序以傳統方式在數個步驟中達成。這 表示：一方面將熱鋼帶的侵蝕作業及一方面將鋼帶的橫截 面減縮成完工厚度的作業在一分離的（或耦合到該侵蝕裝 置的）冷鍛機上發生。此時該冷锻鋼帶一如前述，捲成束 捲，且利用例如一吊車，一滾道運送車及一空氣墊運送系 統運送到一個隔離放置的高溫鍍鋅設備，以在該處回火及 鍍覆。 這種方法方式對冷鍛鍍鋅鋼帶的生產容量有極不利的 影響，特別是在冷鍛機與鍍鋅設備之間的捲取處理很費時 間。此外，這種捲取處理需要額外的人力，因此使得冷鍛 及優質化鋼帶的製造成本都大大提高。如此，在競爭厲害 的鋼鐵市場上的經銷可能大大受限。 3 ---------裝------訂—-----^ (請先閲讀背而之注意事項再填巧本頁) 本紙張尺度適用中國阀家標麥（CNS ) Λ4規格（2丨0乂2()7公筇） 經"部中央標枣局妇工消资合作社印紫 4 265 5 2 、 A? 五、發明説明（y) 因此本發明的目的在將上述種類的方法與設備改革， 使這種優質化鋼帶能更迅速而廉價地製造。 這種目的，依本發明達成之道，係將滾壓鋼帶連續地 先後在一條貫行的處理線上俊蝕，冷鍛及鍍鋅。將冷鍛程 序與侵融及鍍鋅程序在貫行的生產線中耦合，可省却在冷 锻機與鑛鋅設備之間迄今所需之費時昂貴的捲取處理。如 此，一方面整個處理設備的生產容童提高，另方面人員需 求減少。此外，由於捲帶處理省却，故本發明之處理所需 之投資成本大大減少β 總言之，上述之優點可使每噸之優質化冷鍛鋼帶的生 產成本大大減少。 要實施本發明的方法’依本發明，係在一處理設備的 侵蝕級與鍍鋅部分之間至少設〜縮減滾子架，在此縮減滾 小架上，將從侵蝕級進入的滾踺鋼帶直接連續地用一道縮 減批次通過冷鍛成完工厚度。但也可考慮使用數個接在後 方的冷鍛滾子架，以達成鋼帶厚度之較大縮減。 本發明其他細節及優點見於申請專利範圍及以下之說 明，其中詳細說明一個圖式中所示的實施例。圖式中： 第一圖係一個以連續通過操作方式工作的鋼带處理線 ，用於將一滾壓鋼帶(2)作侵蝕’冷鍛及鍍鋅。 此鋼帶處理線(1)有一入口部(3)，在入口部中’先前熱 鍛過且捲成一束捲的滾壓鋼帶(2)被一鉸盤裝置(4)較離。此 外，在入口部⑶中設有一鋼帶焊機（此處未示）°鋼帶焊 接機使可得鋼帶之連續通過對此方法有利’其方式係將個 4 ---------装------1T------^ (請先閱讀背面之注意事項再填荇本瓦) ;紙张纽適财酬雜) (21ί)χ 297公&了"" 426552 A7 _B7 五、發明説明（> ) 別之束捲互相焊接成一條無端鋼帶。 有一侵蝕部(5)接到入口部(3)，在侵蝕部中，舉例而言 ’該鋼帶用電解方式用一種酸流動劑侵蝕，以將熱鍛時產 生的綉層除去。然後將侵蝕過的滾壓鋼帶(2)直接送到一縮 減滾子架(6)並使厚度改變，以達到所要之完工厚度。 在冷鍛程序後，滾壓鋼帶(2)通過一淸洗裝置(7)，在淸 洗裝置中，舉例而言用滾壓油或滾壓乳化液淸洗，並藉侵 蝕將薄氧化物膜除去《如此造成對鋅層的良好附著性，該 鋅層在隨後的鍍鋅部(8)例如用熔融浸鍍方法或用電鍍方式 施覆到該滾壓鋼帶上。 然後這條鍍鋅且因而耐腐蝕的滾壓鋼帶(2)通過一回火 滾子架(Dressiergeniest)(9)，在該滾子架上將鋼帶變光滑， 在一接在該回火滾子架(9)後方的矯直機配合該回火滾子架 (9)把該由滾壓及回火造成的滾壓鋼帶的平坦度偏差〔例如 邊緣波動或中央較厚(voile Mitten)〕除去。 然後將此優質化且滾壓過的鋼帶⑵在一個設在處理線 (1)的出口部(11)中的鉸盤裝置(12)上捲成一束捲。 ---------裝------訂------j (請先閲請背而之注意事項再填寫木頁) 經漭部中央標卑而負工消f合竹社印紫 __ 5 本紙尺度適用中國闽家標皁（CNS ) Λ4規格（2丨OX297公筇）The Consumer Cooperation of the Central Government Bureau of the Ministry of Economic Affairs and Consumer Affairs. 消 印 54 4 265 5 2 Λ 7 Β7 V. Description of the Invention (i) The present invention relates to a method and equipment for manufacturing cold-forged, galvanized and corroded metal strips. A hot-forged steel strip starts * it is first eroded (pickled), then cold-forged, and then galvanized. It has a cold forging machine that is separated or coupled to the erosion grade (Beize) to convert a high-temperature zinc scraper Tempering and plating of this cold-forged steel strip In order to manufacture cold-forged galvanized steel strip, it is known in the background art to etch a steel strip before hot forging on an erosion line. This erosion operation is used to dissolve the embroidery scale produced during hot forging, and to remove the oxide layer formed on the steel strip. The eroded hot steel strip is then deformed by a thickness on a cold forging machine to achieve the desired finished thickness, typically below 1 ™. After the cold forging procedure, the steel strip rolled into a bundle is tempered and plated, for example in a high temperature galvanizing equipment. This strip processing procedure is achieved in a traditional manner in several steps. This means that the erosion of the hot steel strip on the one hand and the reduction of the cross-section of the steel strip to the finished thickness on the other hand take place on a separate (or coupled to the erosion device) cold forging machine. At this time, the cold-forged steel strip is rolled into a bundle as described above, and is transported to an isolated high-temperature galvanizing equipment by using, for example, a crane, a roller conveyor, and an air cushion transportation system to temper and Plating. This method has a very adverse effect on the production capacity of cold-forged galvanized steel strips, especially the coiling process between the cold forging machine and the galvanizing equipment is very time-consuming. In addition, this coiling process requires additional labor, so that the manufacturing costs of cold forging and high-quality steel strips are greatly increased. As such, distribution in the highly competitive steel market may be significantly restricted. 3 --------- Installation ------ Order ------- ^ (Please read the precautions on the back before filling out this page) This paper size applies to Chinese valve standard wheat ( CNS) Λ4 specification (2 丨 0 乂 2 () 7) 筇 "Ministry of Central Standards and Jujube Bureau Women's Workers Consumer Cooperatives Co., Ltd. Printing Purple 4 265 5 2, A? 5. Description of the invention (y) Therefore the purpose of the present invention The above-mentioned methods and equipment are being reformed, so that this high-quality steel strip can be manufactured more quickly and cheaply. This purpose, according to the present invention, is to continuously etch, cold forge and galvanize the rolled steel strip on a continuous processing line one after the other. Coupling the cold forging process with the infiltration and galvanizing process in the ongoing production line can save the time-consuming and expensive coiling process required between the cold forging machine and the zinc mining equipment to date. In this way, on the one hand, the production capacity of the entire processing equipment is increased, and on the other hand, the demand for personnel is reduced. In addition, since the coil processing is omitted, the investment cost required for the processing of the present invention is greatly reduced. In summary, the above advantages can greatly reduce the production cost of high-quality cold-forged steel strip per ton. To implement the method of the present invention, according to the present invention, at least a reduction roller frame is provided between the erosion level of the processing equipment and the galvanized part. On this reduction roll frame, the roll steel entering from the erosion level is reduced. The strip is directly and continuously used in a reduced batch through cold forging to the finished thickness. However, it is also conceivable to use several cold forged roller frames connected behind to achieve a large reduction in the thickness of the steel strip. Other details and advantages of the present invention can be found in the scope of patent application and the following description, in which the embodiment shown in the drawings is explained in detail. In the drawing: The first picture is a steel strip processing line working in a continuous pass operation mode, and is used to erode a rolled steel strip (2) for cold forging and galvanizing. This steel strip processing line (1) has an entrance portion (3) in which a rolled steel strip (2) which has been previously hot-forged and rolled into a bundle is separated by a hinge device (4). In addition, a steel strip welder (not shown here) is provided in the entrance section ⑶. The steel strip welder makes continuous passage of the available steel strips beneficial to this method. The method is to use a 4 ------- --Install ------ 1T ------ ^ (Please read the precautions on the back before filling in the tile); paper New Zealand wealth and money) (21ί) χ 297 公 & 了 " " 426552 A7 _B7 V. Description of the invention (>) The other coils are welded to each other to form an endless steel strip. An erosion portion (5) is connected to the entrance portion (3). In the erosion portion, for example, the steel strip is electrolytically etched with an acid flow agent to remove the embroidery layer produced during hot forging. The eroded rolled steel strip (2) is then directly sent to a reduced roller frame (6) and the thickness is changed to achieve the desired finished thickness. After the cold forging procedure, the rolled steel strip (2) is passed through a honing device (7). In the honing device, for example, it is washed with rolled oil or rolled emulsion, and the thin oxide is eroded by erosion. The removal of the film results in good adhesion to the zinc layer, which is applied to the rolled steel strip in a subsequent galvanized part (8), for example, by a hot dip plating method or by electroplating. The galvanized and thus corrosion-resistant rolled steel strip (2) is then passed through a tempering roller frame (Dressiergeniest) (9) on which the steel strip is smoothed, and the tempered The straightening machine behind the roller frame (9) cooperates with the tempering roller frame (9) to flatten the deviation of the flatness of the rolled steel strip caused by rolling and tempering (such as edge fluctuations or a thicker center (voile Mitten )] Removed. This high-quality and rolled steel strip is then rolled into a bundle on a hinge device (12) provided in an outlet portion (11) of the processing line (1). --------- Equipment ------ Order ------ j (please read the precautions before filling in the wooden page) The central standard of the Ministry of Economics and Labor will reduce the workload f合 竹 社 印 紫 __ 5 The paper size is suitable for China Minjia Standard Soap (CNS) Λ4 specification (2 丨 OX297)

Claims (1)

426552 A8 B8 C8 D8 六、申請專利範圍 1 · 一種製造冷鍛鍍鋅金屬帶的方法，由一條熱鍛過 的前鋼帶起始，將該前鋼帶先侵蝕，再鍍鋅，其特徵在： 該滾壓鋼帶連續地先後在一條貫行的處理線侵蝕、冷 鍛及鍍鋅。 2 · —種製造冷鍛、鍍鋅及侵蝕過之金屬帶的處理設 備，其特徵在： 在侵蝕部(5)與鍍鋅部(8)之間至少設有一減縮滾子架(6) --------^------ΐτ------^ (請先閱讀背面之注意事項再填寫本頁) 經濟部中央標準局負工消費合作社印裝 本紙張尺度通用t國國家標準（CNS) Α4規格（210Χ297公釐）426552 A8 B8 C8 D8 VI. Application for Patent Scope 1 · A method for manufacturing cold-forged galvanized metal strip starts from a hot-forged front steel strip, and the front steel strip is eroded and then galvanized. Its characteristics are as follows: : The rolled steel strip is successively eroded, cold forged and galvanized on a continuous processing line. 2 · A kind of processing equipment for manufacturing cold forged, galvanized and eroded metal strips, characterized in that: at least one reduction roller frame (6) is provided between the eroded portion (5) and the galvanized portion (8)- ------- ^ ------ ΐτ ------ ^ (Please read the notes on the back before filling out this page) Central Standards Bureau of the Ministry of Economic Affairs, Consumer Cooperatives, printed paper, universal paper size t National Standard (CNS) Α4 Specification (210 × 297 mm)
TW087102597A 1997-03-04 1998-02-24 Method and device for manufacturing metal strip TW426552B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19708666A DE19708666A1 (en) 1997-03-04 1997-03-04 Method and plant for producing metal strip

Publications (1)

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TW426552B true TW426552B (en) 2001-03-21

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EP (1) EP0863222A1 (en)
JP (1) JPH10277603A (en)
KR (1) KR19980079720A (en)
CN (1) CN1197123A (en)
CA (1) CA2228772A1 (en)
DE (1) DE19708666A1 (en)
TW (1) TW426552B (en)

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IT1302582B1 (en) * 1998-10-01 2000-09-29 Giovanni Arvedi PROCESS AND RELATED PRODUCTION LINE FOR THE DIRECT MANUFACTURE OF FINISHED PIECES PRINTED OR DRAWN FROM ULTRA-THIN HOT TAPE
DE10009823A1 (en) * 2000-03-01 2001-09-06 Sms Demag Ag Process for coating metallic strips comprises coiling the strip into an endless strip in a winding station, directly subjecting the strip to a main pickling step and a post-pickling step, and then passing through a melt bath
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CN105195513B (en) * 2015-09-28 2017-03-29 南通市中京机械有限公司 A kind of aluminium sheet rolling device
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CN1197123A (en) 1998-10-28
CA2228772A1 (en) 1998-09-04

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