A track from a minimal set

Hey, I might have already searched this one, but didn't find anything back then. Now, 5 years later, I was listening to some old sets, discovering that masterpiece again:

http://www74.zippyshare.com/v/zK722NWM/file.html

Can anyone help me ID it?

Edit: damn I didn't save the file after turning down the beginning and the end. So sorry if it starts a bit abrupt and loud and ends abrupt as well.