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单词 θ102755
释义
the world > space > relative position > closed or shut condition > that which or one who closes or shuts > [noun] > that which closes an aperture > means of preventing passage of gas or liquid > substance > specific (2)
vacuum wax1926

= vacuum grease n.

vacuum grease1946

a grease which because of its low vapour pressure is suitable for sealing joints in a vacuum apparatus.

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更新时间:2024/9/20 23:20:59