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Dongying Lianfeng Petroleum Machinery Co., Ltd.

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tool joint
tool joint
Specification: NC23, NC26, NC31, NC38, NC40, NC46, NC50 and 5 1/2 etc.
Detail: 1. Certification: API certification and ISO 9001:2000 certification 2. Application Area: it is used for drill pipes. 3. Raw Material: 4137H structural alloy steel, that is, 37CrMnMoA alloy steel 4. Steel Grade: E75, X95, G1...
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