音标：[klæk vælv] ；

止回阀

词型变化：名词复数形式 : clack valves

【近义词】

clapper valve瓣阀
clack发出咔嗒声

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unfold unify unique unity universe update upgrade uphold upright urban urge utilise utmost vacant vain valid valve van variation variety vary vast vegetation vihicle veil vein velocity velvet vent ventilate venture verbal verdict verge verify versat

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午后咖啡

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There would soon be an explosion; the kettle would be burst open. It is in this way that boiler explosions are often caused. When there is too much steam in a boiler, and it cannot get out, it presses against the sides of the boiler, until at last th

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学英语单词

-megaly

abbrevn

acute myelocytic leukemia

ageing failure

asbestos-cement slate

Atijo

authorized terms

autopsy start and end date/time

Baroknar

barton's

bear testimony to