高炉配管工在炼铁生产中的作用是什么?
参考答案:
(1)维护炉渣冷却设备;
(2)管理和检修给、排水系统;
(3)保证炉体设备得到相应冷却,提高炉体使用寿命,使高炉持续稳定生产。
The boy doesn’t speak his sister, but his written work is very good.
A.as well as
B.so good as
C.much better than
D.much worse than
若膨胀阀进口小滤网部位发生结霜现象,又听见气流声断断续续,用小扳手轻敲膨胀阀体,气流声变化,且白霜渐渐融化,说明()
A.膨胀阀堵
B.干燥瓶堵
C.管路泄漏
D.蒸发箱堵