The vacuum performance of threaded-adhesive joints was investigated experimentally using the helium mas.

本文采用氦质谱仪对螺纹粘接接头的真空性能进行了实验研究。

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Therefore, the cyclic stress caused by repeatedly cooling and heating during the usage of non-magnetic Dewar is one of the important reasons that causes the decrease of vacuum performance.

因此，无磁杜瓦在使用过程中反复冷却及复温所产生的循环应力载荷，是导致其真空性能下降的一个重要原因。

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In the low temperature, corrosive medium or vacuum conditions, with special performance should be considered the gasket.

在低温，腐蚀性介质或真空条件下，应考虑具有特殊性能的密封垫。

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In order to assess executive pay, one has to raise the quality of the discussion in order to consider pay vs. performance rather than just look at pay in a vacuum.

FORBES: CEO Pay: When Highly Paid Is Not Overpaid