OK it seems Polyus only had a docking capability for transfer vehicles that housed cosmonauts , so they could have a place to stay and enter the servicing module without needing spacewalks. But as I read it, it wasn't a truly manned station, as there were only cosmonauts at the place when a space ship was docked to Polyus.

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To the regular visitor of internet bulletin boards it is clear that it's an excellent idea your parents get to choose your real name.