... " LCD Touch Screen Marking Machine (set include: marking machine, 3.5" LCDcontroller, 2 marking pins) CNC Automatic 3.5" LCD Touch Screen ... motorcycle, car frame ,automotive chassis, engine, mechanical part, machine tool, metal pipe, gear, pump body, valve, various hardness plastic products, ... .Free training installation and operation for the staffs. CNC Automatic 3.5" LCD Touch Screen Marking Machine