... Zhangjiagang TongRun Machinery Co., Ltd. we are specialized in the large-scale welding, stamping, bending, punching, ... Aluminum alloy or as per customers' request 4.Surface treatment:zinc/nickel/chrome plating,hot galvanized,powder ... polish,etc. 6.Our equipment: CNC Stamping machine, CNC bending machine, punching machine,oil Hydraulic pressing machine , CNC welding machine,CNC machining center, CNC ...