ventil

This paper puts forward the nonplanar data model to solve the difficult question of 3d topology of mine ventil...

提出采用非平面数据模型来解决通风网络中的三维拓扑问题;

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,尘、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。