If the cross section area of the two branching ducts are different, the Included angle on the smaller branchduct against the extended center line is usually bigger.
若分枝管的截面积大小不同，则细支管与母管中心延长线间的夹角较大；
2
Ductbranch is rich in natural form of uniform distribution, wall smooth, branch pipe and tube diameter on the transition to a flat.
导管分支丰富，形态自然，分布均匀，管壁光滑，分支导管与上一级导管管径过渡平缓。
3
Rectangular branch takeoff duct with adjustable transition. Circular or rectangular duct can be specified.