A.增大 B.減少 C.不變 D.不確定
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.單繞鋼索 B.雙繞鋼索 C.多繞鋼索 D.復(fù)繞鋼索
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