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真空介电常数
chem.
permittivity of free space
;
permittivity of vacuum
el.
vacuum permittivity
el.mach.
absolute permittivity
真空介电常数
电容率
auto.
permittivity of vacuum
真空介电常数
电容率
magn.
permittivity of vacuum
真空 介 电常数
:
1 phrase
in 1 subject
Electric machinery
1
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