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我矿自制和修理1.6米~3矿车时须将型钢弯制成υ型,而我们车间又无专用设备。为此我们制作了一套装置,利用绞车作动力将
I mine self-made and repair 1.6 m ~ 3 when the curved steel pipe must be made into υ type, and we have no special equipment workshop. To this end we made a set of devices, using winch as power