In this case show me, please, the clear way to win for white, cause this variant 52.Kf5 Ra6 53.h4 Kc3 54.h5 Kd4 55.g5 Kd5 56.g6 ??? isn't winning for black.

You can have a look at exactly how Black wins in every variation here:

http://www.k4it.de/index.php?topic=egtb&lang=en

the Nalimov tablebases for positions with <=6 pieces.

In your variation 55...Kd5 is the drawing mistake: it seems that White needs to keep the 5th rank free to give a check: Kd5 not only doesn't give the check, it blocks the rank, allowing White to push g6 safely and get a draw.

Thanks a lot. That's very useful service.

Immpossible 
Black is the winner