中流

This paper introduced a measuring chamberlet method and character for flow-noise in seawater pipe system and analyzed inferior-limited frequency of reverberation of measuring chamberlet.

摘要介绍了海水管路系统中噪声的小室测方法及其，析了测小室的声场性及产生混响的下限频率。

The pulse pump is a new-type pump, in which the fluid successively flows out in one direction by means of the pulse effect in the uniflow pipe.

泵中态单一,能转换效率高,单级扬程范围广。泵出连续、大而无气蚀危险。