A.1/2 B.1/3 C.2/3 D.1/4
A.手动 B.气动 C.电动 D.液压
A.C B.Z C.T D.M
A.≦0.15% B.≦0.25% C.≦0.35% D.≦0.45%
A.150 B.160 C.170 D.180
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