air suction main的意思|示意

The new method of designing duct of balanced air suction by means of computer is suggested on the basis of analysing constant and decreasing velocities in the main collecting points.

本文在分析均匀吸风管道等速设计法和降速梯形设计法的基础上，提出了利用计算机设计均匀吸风管道的新方法。

The main transformed parts included water cooling wall, burner, coal saver, dust removing equipment, air suction machine and coarse powder separator.

主要改造部分有：水冷壁、燃烧器、省煤器、除尘设备、吸风机和粗粉分离器等。