The upper stem is threaded into the diaphragm retainer nut.

上阀杆通过丝口旋在横膈膜止动螺母里。

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The upper stem is threaded into the diaphragm retainer nut.

手轮下面是一个六角形外螺纹横膈膜止动螺母。

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When the upper stem rides up and down on its threads it now moves the lower stem by a mechanical connection.

当上阀杆沿着它的螺纹上下运动时，通过机械连接带着下阀杆一起运动。

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The behavior appeared to initially stem from several members of upper management, and it quickly began to permeate throughout all levels of the company.

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Peers in parliament's upper chamber voted by 212 to 92 on Monday to allow research using stem cells to develop treatments for killer diseases such as leukaemia, Parkinson's and cancer.

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