How to import several objects as one static mesh?

I have built my scene in Blender. I have several doors placed on the scene as different objects, even though they are exact copies of each other. How can I import them in unreal as one static mesh?

In other words, how to keep the position of each PLACED door (in the level) but have them as one only static mesh in the content browser?

Should I be looking at instanced objects in blender? Will they import correctly?