1)26 years experience on OEM precision casting 2)strict Quality Control system 3)small order ... 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. Precision casting pipe part