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How to perforate in a import 3ds object?

Hi everybody,now i want to drill a hole in the 3ds object i import,and if the mesh of the 3ds object within the hole, this part mesh will be delete,that mean if the surface of the object within the hole, this part will be delete,can anyone give me some suggestions?

that is :

first i import a 3ds format file,then i use a cylinder to penetrate it,So everything

belong to this 3ds file but within my cyLinder will be deleted,

for example if this 3ds file is a cube,to perforate a hole on it,the result will be a cube whose front face and back face all add a circle, am i make the problem clear?

Thanks. Good luck