both end thread
... 大端带螺纹large end thread (LET) 两端带螺纹both end thread (BET) 一端带螺纹one end thread (OET) ...
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... betlands泛滥平原 BET两端带螺纹 betabeamβ束 ...
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在工具和管子的两端安装带螺纹的接头将工具或管子连接起来。
To connect tools or tubulars by assembling the threaded connections incorporated at either end of every tool and tubular.
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