Wedge gate valve take advantage of wedge style dense cover seal up, Can by hand wheel plus carry regulate dense cover paste equal to tightness degree.

楔式闸阀利用楔式密封面密封，可通过手轮加载调节密封面贴合的紧密度。

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This essay describes the application of the cylinder cram mechanism and the planetary gear system in the multi head anti stealing cover seal mechanism.

通过行星轮系-圆柱凸轮机构在多头防盗盖封口机中的应用，详细论述了其运动原理及设计要点。

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Folds of skin cover their eyes and ears to prevent water from entering, and the nostrils close with a watertight seal.

皮肤的皱褶盖住它们的眼睛和耳朵，防止进水，它们的鼻子内有可关闭的防水封垫。

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Monsoor "ran out into the street with another SEAL, shot cover fire and dragged his comrade to safety while enemy bullets kicked up the concrete at their feet, " according to Navy documents.

CNN: Navy SEAL paid ultimate price to save buddies

In his wine cellar in Napareuli, six miles down the road from the Alaverdi Cathedral, Gela Gamtikulashvili crosses himself and prises the cover of a qvevri from its airtight clay seal.

BBC: Discovering wine in Georgia