Industrial copper | Copper volumes row | copper straight row | T3 copper row and other non-ferrous metals. Copper tube take steel or steel plate bent to shape into round and square shape and then welded together, there are seams brass surface. Use a blank of steel sheet or strip. Production efficiency, types of specifications and equipment investment, but usually its strength than seamless copper small. The 1930s, due to the superior quality of the strip rolling the rapid development of production and welding and inspection technology advances, the weld quality continued to be raised, the type specifications of the welding brass day by day more and more and more and more replaced in the field of seamless copper. Shanghai Tian Rui Metal Materials Co., Ltd. (according to user needs, can be produced according to drawings) Marketing Miss Li T :021-63066307/56062869 F :021-56060561 QQ: 441594627/1650507469 Address: Shanghai Zhabei District Lingshi Road 891 Email: coco_trcopper@163.com URL: www.tr-copper.com lwtrjs20130520