立式三螺杆泵采用机械密封加骨架油封双重密封方式，无泄露。
Vertical three-screw pump adopts double seal mechanical seal and framework oil seal, no leakage.
今天继续做第二个模型，改进了气缸的密封方式，效果还不是很确定。
Today continue to make the second model, we changed the way to improve the cylinder, but the effect was not clear.
介绍了锂电池的特点、分类、结构及密封方式，给出了水雷用一次锂电池组在水雷中应用的设计方法。
This article introduces the characteristics, classification, structure and sealing method of Lithium battery as well as a design method of primary Lithium battery pack applying on sea mines.
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