speaker plates welding fabrication parts 1.Process: welding and ... to Dalian Zhong Sheng Metal Products Co., Ltd!Name:speaker plates welding fabrication parts Features:1.Material:steel plate, ... Lathes,Sawing Machines,Meter,Lathe,Bench Tapping Machine,Drill Stand,Grinding machine etc.7.Test Equipment:CMM,Spectrometer, ... dot cominfo at china-casting dot com speaker plates welding fabrication parts