虹吸的

Develops the thermosiphon heat recovery equipment based on the operating principle of the thermosiphon.

在研究管工作机理的基础上,开发设计出管能量回收装置。

The existing problem in operation of siphonal sand filter and innovation were introduced.

介绍了式砂滤器在运过程中出现的问题及改造措施。