论文部分内容阅读
In view of the shortcomings of the overwind protective function of the present mrrrrrrrrnine hoist, a improved scheme that the hoist is equipped with emergency terminal rrrrrrrrnswitch is put forward.
In view of the shortcomings of the overwind protective function of the present m r r r r r r nine hoist, a improved scheme that the hoist is equipped with emergency terminal r r r r r r r r nswitch is put forward.