... : marking machine, 3.5" LCDcontroller, 2 marking pins) CNC Automatic 3.5" LCD Touch Screen Marking MachineBasic principlesComputer controls ... pipe, gear, pump body, valve, various hardness plastic products, hardware part, Aeronautics, Electronics, war and light industry for marking steel ... Free training installation and operation for the staffs. CNC Automatic 3.5" LCD Touch Screen Marking Machine