Encl. : a telegram from my home.
附：拍来的电报一份。
This paper describes and analyses the reasons of the failure of dual-encl-face mechanical seal for hydrocarbon pump and proposes a reformation and design method.
本文阐述并分析了轻烃泵用双端面机械密封的特点，提出了改进方法和设计依据。
This paper describes and analyses the reasons of the failure of dual-encl-face mechanical seal for hydrocarbon pump and proposes a reformation and design method.
本文阐述并分析了轻烃泵用双端面机械密封的特点，提出了改进方法和设计依据。
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