The wind vane shall be set at distinct positions in the plant area so as to facilitate safe evacuation of the personnel in case of any leakage of toxic gas es.

在厂区显著位置设置风向标，万一发生有毒气体泄漏时，便于人员安全撤离。

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As there were leak on contact place between shaft and rotor body in built up hollow rotor, dropping discharg gas speed of pump and efficiency applied of oil sealed sliding vane rotary vacuum pump.

组合式空心转子由于轴头与转子体之间的结合面存在着渗漏，使泵的抽气效率性能下降，从而影响其在应用中的效率。

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The structure and designing calculation of auxiliary vane wheel after the modification of the shaft seal for the gas compressor have been briefly described.

简单介绍了对气体压缩机上的轴封改造后的副叶轮密封装置的结构及设计计算。

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