Một số video về piston quay và bugi

[hochoi]

http://www.youtube.com/watch?v=E-J8yQ1DXz8&feature=player_embedded
http://www.youtube.com/watch?v=E-J8yQ1DXz8&feature=player_embedded
http://www.youtube.com/watch?v=IDMnt3uwSP4&feature=player_embedded
http://www.youtube.com/watch?v=LAi45jhcaSY&feature=player_embedded
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