短語詞組短語traction drive life 曳引電梯Development of Traction Drive 牽引傳動研究綜述ac traction drive 交流牽引傳動electric traction drive 電力牽引傳動EV Traction Drive 牽引電機系統(tǒng)traction drive lift 曳引敺動電梯traction drive belt 行走部分的傳動皮帶traction drive type 牽引式traction drive in reciprocating 往複牽引傳動 返回 traction drive