短語詞組短語reversed polarity 反極性Reversed Polarity Test 反極性測試control field reversed polarity 控制磁場反曏極性Gilbert reversed polarity ehron 吉爾伯特反曏極性時Matsuyama reversed polarity chron 松山反曏極性時reversed polarity direct current 反接直流reversed polarity belt 反極作用reversed polarity machining 負極性加工exciter reversed polarity 勵磁器反曏極性 返回 polarity reversed