... tube of electric force 电力线管 unit tube of force 单位力管 ; 单位力线束 unit electrostatic tube of force 单位静电力管 ...
基于12个网页-相关网页
短语
单位磁力管
unit magnetic tube of force
单位电力管
unit tube of electric force
单位静电力管
unit electrostatic tube of force
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