单项选择题
A.4t B.3t C.2t D.1t
A.结构复杂 B.索系简单 C.不能增力 D.不用止动器
A.Engineering Ropeway B.Cable and Rigging C.Cableway Yarders D.Carriages and Affiliated Equipments of Cableway
A.斜交 B.平行 C.斜交、平行相间 D.不斜交也不平行
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