The engine is cold and there is no vapour lock in the pipe.
发动机很冷，管道中也没有封。
The fire work technology of soil blocking and vapour replacing for pipe maintenance is introduced in the paper.
介绍了输油管道检修中的泥土封堵动火与蒸汽置换动火技术方法。
Considering the vapour heating as the modeling object, the dynamic formula between vapour temperature and vapour flux of the pipe is set up.
以蒸汽加温为建模对象，建立管道内蒸汽温度跟蒸汽流量的动态关系式，组成温室用蒸汽管道进行加温时的温度对象模型。
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