merge surface in maxsurf

I import one igs ,and too many surface showed,how can i merge these pieces,tks

 

they can be merged if the satisfy some conditions. The conditions are:
1. they should be of equal number of control points,

2. They should have same longitudinal stiffness

If the conditions are satified, then you can select 2 control points of that 2 diffrent surfaces and go to :
Controls>Bond edged>No Tengency

Then the 2 surfaces will be bonded

 

thanks you first ,bu i am so painful,my surface is messy and no any regulation

 

Turn on the control point and delete which excess control point. When the number of control point in 2 parts are equal, you can merge it.