答案:防溜
解析:解析:开放状态)
A. (A)10
B. (B)15
C. (C)20
A. (A)制动管
B. (B)均衡风缸
C. (C)降压风缸
A. (A)LC及LLC
B. (B)LLC及1-6C
C. (C)LC及1-6C