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单词 θ75262
释义
the world > matter > gas > air > [adjective] > under pressure > in which a vacuum has been produced > complete or incomplete vacuum (2)
hard1898

Physics. Of a vacuum: containing very little air or gas; almost complete; (of a vacuum tube or thermionic valve) containing such a vacuum; chiefly in…

rough1900

Designating a vacuum of the lowest degree of evacuation.

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更新时间:2024/12/24 11:18:11