“dry vacuum pump”的概念、定义、翻译、参考文献-科学参考

单词	dry vacuum pump
释义	dry vacuum pump Encyclopedia 工学真空泵释 dry vacuum pump干式真空泵能在105（大气压）～10-2帕的压力范围内工作，在泵腔内不使用任何液体，排气口与大气相通，能直接向大气排气的泵。又称无油真空泵。
随便看	left-handed reference frame left-handed rotation left-handed system left handed transmission line left-handed transmission line left-handed trihedral left-handed upper continuous left-hand inclusion left-hand lower derivative left-hand lower limit left-hand parenthesis left-hand rule left-hand side left hand spinors left-hand upper derivative left-hand upper limit left hereditary ring left heredity left Hermite ring left homotopy inverse left ideal left ideal of an algebra left identity element left identity 「= left identity left indent

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