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WebMay 13, 2024 · About Cangzhou Great Drill Bits Co.,Ltd. Cangzhou Great Drill Bits Co. Ltd., founded in 2010, speciallized in processing research of steel and diamond materials, is involved in the R&D, design, production and sales of petroleum equipment, up to now we have being the top material supplier of CNPC, SINOPEC, CNOOC.We have a 40,000 … WebWe focus on the drilling industry and we only do the drill bit 访问Han Chen的领英档案,详细了解其工作经历、教育经历、好友以及更多信息 … WebCangzhou Great Drill Co., ltd specializes in designing, manufacturing, marketing and serving the high performance diamond bits and drilling tools used in petroleum industry … im not stupid trailer