短語詞組短語rational earth electric resistance 大地電阻率earth plate resistance 接地板電阻earth electrode resistance test 接地電極電阻測試earth h resistance meter 接地電阻測量計earth h resistance 接地電阻;大地電阻earth -resistance 接地電阻計earth electrode resistance 接地電極電阻earth h resistance tester 接地電阻測試儀 返回 earth resistance