specializes in designing,manufacturing,marketing and serving the high performance diamong *域名隐藏* company is established by the top experts of the field,and equipped with advanced equipments and facilities. our diamond bits named great,which size ranging from 3"to17-1/2".all the products have been awarded the iso9001 certificate. furthermore,the experienced and knowledgeable service team will ensure the superior performance of our produces in both the domestic and international markets

主要产品/业务: tricone bit,drag bit,hole opener,single roller cone bit,safety clamps,hammer union,elevator,centralizer,chisels,slips,tong