短語詞組短語potential l drop 電位降potential -drop ratio method 位降比法magnetic pipe potential drop 磁壓降magnetic potential drop 磁勢降落;磁位降ohmic potential drop [物化]歐姆電勢降;翻譯total potential drop 總水位差arigap magnetic potential drop 氣隙磁壓降potential drop -out 面臨退學的學生 返回 potential drop