What's this?[ ]
A. This is M.
B. It's a M.
C. It's M.
D. That's M.
答案：C
压缩机启动后按（）联锁仪表复位按钮。
A.放空
B.泵和压缩机
C.装置内外间
D.热源和溶剂输送管线
