... Guoyu Precision Machinery Co.,Ltd-The punching and flanging punchdie and perforation punch may amount to aprecision of ... sleeves, die inserts,carbide pins,die casting part and components,locking blocksApplied inautomobile die, precision plastic ... Cylindrical grinder,Inner-aperture grinder, CNC grinding machine,CNC milling machine, polishing machine, engine lathe, Quadratic element, Projector ( ...