... certificate:ISO9001:2008 Type: Sheet-metal Product Metal Stamping Mould Dongguan Richhong metal Co. Ltd has long ... ; Tungsten steel, etc.Machining processesMetal fabrication, machining, welding, forming, shaping, punching, drilling, turning, milling, grinding, chip formatting ... deep drawing, bending, spot or seam welding, spinning, forging, sand casting, die casting, investment casting, etc.Surface ...