Improvement for the mechanical seal cover and nationalized modification for the mechanical seal are made, and good results and benefit have been achieved.

分析了引进苯酐泵的运行情况，进行了机封压盖改进和机封国产化设计，取得了良好的效果和效益。

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A mechanical seal and water seal combined floor drain consists of a floor drain cover, a main floor drain body, a float and a hose type magnetic seal valve.

一种机械密封与水封组合地漏，由地漏盖、地漏主体、浮子和软管式磁力密封阀组成。

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