ram force

In terms of big FRP wind tube which is designed and manufacturedby our chinese and exported to Pakistam, its main design and process are brieflyintroduced in this paper.

本文结合我国自行设计和制造并出口巴基斯坦拉克拉工程的大型玻璃钢风筒，简要介绍其主要设计结果和工艺制造路线。

Influence of the Cyclone's Struclure on the Properties;

旋风筒结构形式对其性能的影响

Effect of varying mode of air inlet and outlet on the main parameters of the cyclone;

不同进出风方式对旋风筒主要性能参数的影响

Research on cyclone separating efficiency affected by air leakage at the discharging chute;

下料管处漏风导致旋风筒分离效率降低幅度的影响因素研究

Based on No 8608 high yield and high benefit face of 406 area in seam 11 of Majiliang Mine this article application of hard ventilating tubes in improving exeed limit of harmful gas in part in coal faces.

此次处理事故使用了硬质风筒,改变了工作面的通风系统,实现了局部有害气体的安全排放。

The gas flow line and flow rate in the point of goaf were estimated,and the gasdrainage effect of extract duct set up at the air return end of coal-face is analysed in this paper.

同时分析了试验工作面引排风筒对上隅角瓦斯的排放作用。