Chengdu History Petroleum Technology Co., Ltd.( CDHP) specializes in R& D, production and technical support for precious PDC bits, tricone bits, diamond bits and can supply drill pipes and well....
Chengdu Linray Carbide Co., Ltd. wwwlinraycarbidecom specializes in research, manufacturing and sales for tungsten carbide material and tungsten carbide parts, as one of famious manufacture in....