单项选择题
A.5% B.10% C.15%
A.240 B.270 C.300
A.1 B.2 C.4
A.最高油压 B.最低油压 C.都更换
A.工作制动 B.二级安全制动 C.调绳
A.5 B.10 C.15
A.碟形弹簧 B.油缸活塞 C.调节螺母 D.拉紧弹簧
A.30% B.40% C.50% D.60%
A.20 B.15 C. 10 D.5
A.KJ4-6m B.KL2-3m C.JK