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Hejian Huanyu Petroleum Machinery Co., Ltd was established in 1998, specializes in TCI Rock Bit, Steel Tooth Tricone Bit, PDC Drill Bits, Hole Opener, Drag Bits, Bit Breaker, Stabilizers, for water well, oilfield, construction and underground foundation work all over the world. All of our products are in accordence with API and ISO standard. Now we have exported to more than 50 countries and gained good reputation among clients. You will get the honest service and good quality here. Welcome email us for latest catalog and price.