Foroccasionalheavyloads.twocranescanbearrangedtoworktogether.Theoperatingofordeckcranemotorsmaybehydraulicorelectric()A、principleB、mediumC、instructionD、voltage
题目
Foroccasionalheavyloads.twocranescanbearrangedtoworktogether.Theoperatingofordeckcranemotorsmaybehydraulicorelectric()
A、principle
B、medium
C、instruction
D、voltage