Several combinations of Geometry Method:
Premise: take them [reference] coordinates set to the same position,
Then, click [Boolean operations and split] - [union], click on the part of all of geometric graphics. Remember to choose whether to keep "internal borders."
Final Construction selected (F7) can be.
Methods good model has been constructed inside the burrow: [poor] set
The first selected object is not subtracted, then select the object needs to be subtracted. over
