crank arm的用法和樣例：
例句
- In most bicep exercises, you either do both arms at the same time, or the non-working arm is resting while the working arm is in motion.
從你的手肘部位開始，兩手握著啞鈴，曲臂使啞鈴處於向上的方向以做一個標準的肱二頭肌訓練。 - A pedal is pivotally secured to the pivot link and includes an arm.
踏板可轉動地固定於轉動連桿上，並包括一個臂。 - A study of the dynamic stability of an eccentric slider crank mechanism with elastic effects at both joints of the coupler is presented.
討論了連桿接頭處具有彈性效應的偏心曲柄滑塊機構的動態穩定性。
