汽轮机冷态启动的初始阶段,蒸汽对汽缸内壁的放热属于()凝结放热。
参考答案:膜状
—When did the doctor's new book ______?
—Last month. [ ]
A. take out
B. go out
C. come out
D. put out
计算题:何为隔爆型电气设备和增安型电气设备?