1·Equivalent triangle structure is constructed with hinged bar elements to precisely simulate the effect of wire rope pulley block in the finite element analysis of structure of construction machines.
在工程机械结构有限元分析中，采用铰接杆单元构造等效三角结构，准确的模拟钢绳滑轮组的作用。
2·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。
3·The skillful design of the pulley block makes the largest door leaf able to bear the 400kg dead load of the leaf.
滑轮组的巧妙设计，使最大门扇可承受400公斤的门扇自重。