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drill collar

drill collar

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联系人 Ms. sun

xuelian, Tianjin, Tianjin

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The collars are made of AISI ***5H forging or finish rolling alloy structural ***** drill collar are trepanned and drifted to API Spec 7. Grinding crafts adopted finish boring technology eliminates regions of the weld stress concentration, making welding appearance more perfect, and increasing their life.

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Ms. sun < Tianjin Shiruida Machinery Import & Export Co., Ltd >

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