短語詞組短語mechanical l advantage 機(jī)械利益actual mechanical advantage 實(shí)際機(jī)械利益MECHANICAL ADVANTAGE OF LEVER 杠桿機(jī)械效益westbank mechanical advantage 機(jī)械利益ideal l mechanical advantage 理想機(jī)械利益pitch mechanical advantage switch 俯仰操縱傳動比變換器電門ideal mechanical advantage 理想機(jī)械利益mechanical advantage shifter 機(jī)械效益調(diào)節(jié)器mechanical advantage ratio 傳動比 返回 mechanical advantage