内容真理 Intensional Truth

变容真空泵 [真空] positive displacement pump

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真空电容率 vacuum permittivity ; permittivity of free space ; [电] permittivity of vacuum ; Coulomb force constant

往复式变容真空泵 Reciprocating positive displacement pumps

容积式真空泵 vacuum displacement pump

真空容器 [真空] vacuum vessel ; vacuum chamber ; Evacuated Chamber ; vacuum container

失真容限 distortion tolerance ; permissible signal distortion

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