For example, the Capacity of Jet Fanin tunnel,the flux distribution and resistance loss in the chimney.

重点研究了射流风机在隧道内的的调压性能，竖井三通的气流分布以及局部阻力损失。

The new muffler device has simple structure,it has lesser effect on the resistance loss of chief ventil...

该消声装置结构简单,对主要通风机的阻力损失影响小,防尘、防潮及降噪效果明显,可广泛的应用于煤矿主要通风机的消声降噪。