Rook Ending white to play can black win?

[Event "ChessCube Game"]
[Site "www.chesscube.com"]
[Date "2012.07.12"]
[Round "-"]
[White "martin78<a href="/chess-player/chesscube" onclick="XPopPlayerProfile( 'chesscube');return false;">@chesscube</a>.com"]
[Black "sawyert<a href="/chess-player/chesscube" onclick="XPopPlayerProfile( 'chesscube');return false;">@chesscube</a>.com"]
[Result "1/2-1/2"]
[ECO "A04"]
[Time "15:49:33"]
[TimeControl "300"]

1. Nf3 Nc6 2. c4 e5 3. Nc3 Bc5 4. g3 d6 5. Bg2 Nf6 6. O-O O-O 7. h3 e4 8. Ng5 Re8 9. Ngxe4 Nxe4 10. Nxe4 Bxh3 11. Nxc5 Bxg2 12. Kxg2 dxc5 13. e3 b5 14. b3 Ne5 15. d4 cxd4 16. exd4 Nc6 17. Bb2 bxc4 18. bxc4 Rb8 19. Bc3 a5 20. Qg4 Qf6 21. Rad1 Rbd8 22. Ba1 Nb4 23. d5 Qg6 24. Qxg6 fxg6 25. a3 Nc2 26. Bc3 Nxa3 27. Bxa5 Nxc4 28. Bxc7 Rd7 29. d6 Nxd6 30. Bxd6 Red8 31. Rfe1 Rxd6 32. Rxd6 Rxd6 33. Re7 Kf8 34. Ra7 Rf6 1/2-1/2