Date: 08 Jan 2010
It is used to connect tubings or drill pipes with different sizes and threads. Subs are made of high quality alloy steel through special heat treatment means, and processed by means of numerically-controlled machine multiple mechanical properties, conforming to API Spec7.
Contact information:
Dezhou Quanxing Petroleum Machinery Co., Ltd
No.2687 Yuying Road, Tianqu Industrial Zone Dezhou City, Shandong Province[253000]
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