之后驱动臂通过弹簧拉动返回初始位置,此时驱动臂下面的小轮是滚动返回的,不产生相反的摩擦力。
The process is just like rowing a boat. And then, the driving arm return to the primary position by the pulling from the spring.
之后驱动臂通过弹簧拉动返回初始位置,此时驱动臂下面的小轮是滚动返回的,不产生相反的摩擦力。
The process is just like rowing a boat. And then, the driving arm return to the primary position by the pulling from the spring.
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