Union mesh

Support Modeling
1

hi
How to solve this problem
http://www12.0zz0.com/2017/04/26/12/775786980.jpg

http://www12.0zz0.com/2017/04/26/12/571396911.png

I’m sorry I can not explain More

2

It’s difficult to see just what you’ve got going on. But if any of the objects have a mirror modifier, apply it before you do the union.