Pedestal cranes have limit switches to restrict movement of which function（s）________．A.Hoist upper & lower limitsB.Luff travel limitsC.Rider block hoist upper & lower limitsD.All of the above
Pedestal cranes have limit switches to restrict movement of which function（s）________．
A.Hoist upper & lower limits
B.Luff travel limits
C.Rider block hoist upper & lower limits
D.All of the above
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