The rocker arm is connected with the balance weight block through a rotary shaft, a cam, a pulley, a steel cable and a lifting rod, and an initial position can be selected through a barrier shaft.

摇臂通过转轴、凸轮、滑轮、钢丝绳、提升杆与配重块相连，初始位置可由挡轴选定；

youdao

Heading toward the rail from the pits--the car would have to be a mere arm's length from the barrier to top 200 mph.

FORBES: One Lamborghini, One Man, 200 MPH