I've exported a 2D drawing from Sketchup which consist of not filled shapes made with lines. I want to keep the exact dimensions and manipulate it in Inkscape, so I imported it using Vector Magic. The problem is that it "translates" the lines as shapes themselves; i.e., it fills their thickness as if they were actual shapes:
<there's sth wrong with StackExchange, I can't add a pic (it says image too large but it is only 29k), so I'm inserting a link to the image: >
https://drive.google.com/open?id=0B4BVfTXbWZ6PRXhOZk5qVm1DVWM
Is there anything I can do in Inkscape (please don't mention other software) to have those lines as just mere lines/strokes without any fill or thickness?