A device for transmitting rotary motion, consisting of a handle or arm attached at right angles to a shaft.
A device for transmitting rotary motion, consisting of a handle or arm attached at right angles to a shaft.
曲柄一个传递转动的部件，包括一个手柄或把手与一个轴直角相连
A device for transmitting rotary motion, consisting of a handle or arm attached at right angles to a shaft.
曲柄一个传递转动的部件，包括一个手柄或把手与一个轴直角相连