轴流风机同离心式风机均属于()。
参考答案:透平式机械
Read and guess. 猜猜我是谁。
1. I play on a team. I am a .
2. I teach English. I'm an English .
3. I drive a bus. I'm a bus .
4. I wrote many novels(小说). I am a .
5. I'm a boy. I work in a restaurant. Who am I ? .
产生滑动轴承油膜振荡故障的原因是()
A.轴承稳定性差
B.轴承过度磨损
C.地脚螺栓松动
D.外界激发