A simple device, such as a lever, a pulley, or an inclined plane, that alters the magnitude or direction, or both, of an applied force; a simple machine.
英
美
- 机械装置一个简单装置,如杠杆、滑轮或斜面刨,可以改变作用力的大小或方向或同时改变; 简单机械装置