1)26 years experience on OEM precision casting 2)ISO9001:2008, CE/PED Certified by TUV 3 ... yearheat treatment:anneal, quenching, normalizing, carburizing,polishing, platingMachiningCNC and NC machining, turning, milling, drilling, boring, threading, grinding machines and test facilityCertificationObtainISO9001 ... , pack the parts into plywood or iron case for transportation. cnc precision casting part