- arm 机械手臂；机器手
long arm 长臂
rocker arm 摇臂，摇杆
swing arm 摇动臂
control arm n. 控制杆，操作杆
arm of the law [讽刺语
- joystickn. 操纵杆，控制杆
- leverprinciple 杠杆原理
brake lever 制动杆
lever handle 手柄；杠杆手柄；杆式手柄；手柄操纵杆
hand lever 手柄；手制动杆；柄；手杆
control lever 控制杆
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