Some transformations have been made for 4m hoister in Jinping Phosphate Mine, including reel repairation, steel cable feplacement, ax1e bush repairation, skip and deepth indicator transformation and rub belt of contracting brake replacement,ect.

• 介绍了锦屏磷矿4m卷扬机改造的内容，包括对卷筒进行修补、钢丝绳更新、轴瓦更新、箕斗及深度指示器的改造、抱闸磨擦带的更换等。