metal welding product: 1.material:steel ,ss,aluminum,copper 2.ISO9001:2000 3.stamping bending 4.high precision +/-0.1mm Shanghai Yijian mechanical equipment Co., LTD was established in March 2002, now located in Shanghai city, The factory’s area is 2000 Square meters . *ISO9001:2000*Non-standard production according to customers' drawings or samples*Material:stainless steel,brass,copper,hardeded ...