单项选择题
A.增大 B.减少 C.不变 D.不确定
A.The Development and Design of Strop Ropeway B.Basic Theory of Suspension Cable C.Surveying and Designing of Cableway D.Installation and Management of Cableway
A.单绕钢索 B.双绕钢索 C.多绕钢索 D.复绕钢索
A.The Development and Design of Strop Ropeway B.The Development and Design of Passenger Ropeway C.Surveying and Designing of Cableway D.Installation and Management of Cableway
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