蝶阀有弹密封和金属的密封两种密封型式。
The Die valve has already played hermetic sealing and metallic to seal completely two kinds of hermetic sealing patterns.
介绍了油井管的几种连接结构及其密封型式。
Knowledge about several connection ways and sealing types for oil-well pipes are given in the article.
步兵战车侧减速器的密封，采用的是接触式机械密封型式。
The contact-type mechanical seal is used in the final drive of the infantry combat vehicle.
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