It thunders through the forest but it can balance its fantastic weight on one foot before a circus audience.
它吼声如雷，响彻整个森林，但是，面对看马戏团的观众，它能用一条腿平衡它那难以想象的笨重身躯。
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；
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