Mutexes are necessary tools for threaded programs, but they can't do everything.

互斥对象是线程程序必需的工具，但它们并非万能的。

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Sealing coring tools mainly consists of external threaded adapter, balance piston, limit joint, inner and outer barrel, core catcher, locating pin, sealing head and coring bit.

密闭取心工具主要由外螺纹接头、平衡活塞、限位接头、内外筒、卡箍岩心爪、定位销、密封头、及取心钻头等部件组成。

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To connect tools or tubulars by assembling the threaded connections incorporated at either end of every tool and tubular.

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。

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