在无轨巷道中多用起重滑车、滑轮、复式滑车、铰车和千斤顶等运搬材料和设备。利用这些工具虽然减轻了工人的劳动强度,但仍属手工劳动。因而不能显著地提高劳动生产率。在这些条件下,使用一机多用设备,完成装、运、卸和安装等一系列相关的辅助作业是卓有发展前途的。 In track-free tunnels and more with lifting blocks, pulleys, duplex block, hinges and jacks and other moving materials and equipment. Although the use of these tools has reduced the labor intensity of workers, they are still hand-operated. Thus can not significantly improve labor productivity. Under these conditions, it is very promising to use a multi-purpose machine to complete a series of related auxiliary operations such as loading, shipping, unloading and installation.