冷凝液泵不打量的常见故障有哪些?怎么处理?
参考答案:
1.电机转向反;
2.叶轮轴向严重磨损;
3.有空气漏入泵内;
4.泵进口滤网堵;
5.备泵止逆阀内漏;
6.密封水未送上。
My pencil is ___________ cm. [ ]
A. 20
B. 50
C. 60
The managers discussed the plan that they would like to see______the next year.
A.carried out
B.carrying out
C.carry out
D.to carry out