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Roll forming apparatus
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パイプの製造のための組み立て溶接ミル
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Method of and apparatus for continuously producing small section welded steel tubes
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Method and apparatus for shaping flat strips of material into tubular bodies
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一种用于钢管加工的焊接装置
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Spiral pipe machine
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Roll former for tube mill
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Method and apparatus for forming spiral tubing
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Method of producing spiral pipe
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Rotary seam guide
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厚い壁厚と大きい直径とを有する耐圧性の管を誘導曲げ変形させる方法、および誘導式管曲げ加工装置
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Pipe-making machine
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Method of compensating for the effect of cambered strip stock in making helical seam metal tubing
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Strip edge guide device for tube mills
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小径金属管的制造方法以及制造装置
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Welded steel pipe manufacturing apparatus and method
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Process and apparatus for making spiral tubing by electric welding
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Machine for electrical-resistance welding of sheet-metal pipe
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Resistance welding machine
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一种薄壁焊管的板料传送定位装置
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直径和壁厚可调的螺纹管桩生产方法
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Устройство дл сварки пр мошовных труб
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Сварочна клеть дл изготовлени труб с продольным швом
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