It points out that the position of the maximum strain, stress and tension is at first group trough type roller, not at passing poion of pulley if the head drum works as pulley.
指出在头部滚筒作为驱动滚筒的布置系统中，胶带最大应变、力及张力位置不在驱动滚筒相遇点，而在过渡段第一组槽形托辊处。
Steel column is fixed to special jig, slipping below the installation position by chain block and lifting by pulley block and windlass.
将钢骨柱固定在专用胎架上，通过倒链滑移至安装点下方后，采用滑轮组和卷扬机进行提升就位。
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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