This strength and the metal sealing allow this valve to be used in the most severe services.

这种强度和金属密封使这种阀门可以用于最严格的应用中。

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According to the materials can be divided into dynamic seal metal seal and metal sealing valve.

根据动密封的材料也可分金属密封和非金属密封阀门。

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Electric or hydraulic flapper valves are usually equipped with non-metal sealing butterfly valve system to use.

电动或液动插板阀通常与非金属密封蝶阀配系运用。

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In 1998, Lawrence Berkeley National Laboratory physicists Max Sherman and Lain Walker tested a variety of sealing materials on sheet metal ducting, then heated and cooled the ducts to simulate the aging process.

FORBES: Magazine Article

As the bacteria responsible for the tooth decay are sealed in, and deprived of nutrients, the act of sealing the decaying tooth with the metal cap should prevent the decay from spreading, at least until the baby tooth is shed at around 10 years of age.

BBC: Children could be spared dentists' drill