在钻机或修井作业机的绞车中使用提升滚筒。
A hoisting drum is used in the drawworks of a drilling or workover rig.
提升机用来把物料从烤箱传送到滚筒。
Hoister was used to convey the food from roasting oven to the roller.
针对交流双滚筒单绳缠绕式提升机在多水平运行时，中间水平没有电气制动的问题，提出改造方案。
Directing to the problem of ac double-drum single rope winding lifter working in multiple level without electric brake in middle level, put forward the reform plan.
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