A、A.高压气缸
B、B.气缸
C、C.低压气缸
答案:B
A. (A)20-22s
B. (B)18-20s
C. (C)15—18s
解析:解析: J167
A. (A)进油管
B. (B)高压出油管
C. (C)回油管