Taiyuan Best Casting & Forging Co., Ltd.

Steel Pipes
Drill Collar

Drill Collar

Drill Collar  our factory have API Certificater, we can supply all Drill Collars in API Standard 1)  AISI 4145H Drill Collars 2)  AISI 4145H Solid Round Bars 3)  AISI 4140/4145H Stabilizers Forgings      sulfur and...



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