Control valve is a pipe attachment, which is used to change the channel cross-section and flow direction, the control flow of a medium transport device.
调节阀是一种管路附件，它是用来改变通路断面和介质流动方向，控制输送介质流动的一种装置。
2
It is revealed that the roughness factor, slope of the canal bed, crosssection of the canal and sediment sizes are the important factors which influence the sediment transport capacity of the canal.