A.50-100 B.100-150 C.100-200 D.100-300
A.绝缘无极绳圈 B.尼龙绳 C.麻绳 D.钢丝绳
A.1.0m B.1.5m C.3.0m D.5.0m
A.3-5 B.2-3 C.1-2 D.6-7
A.2 B.3 C.4 D.5