[postlink]https://videomiracles.blogspot.com/2011/12/how-helicopter-works-video-about.html[/postlink]
http://www.youtube.com/watch?v=I9ScVZ437xAendofvid
[starttext] This is a useful video for anyone who want to know about helicopter. Really great. [endtext]
[starttext] This is a useful video for anyone who want to know about helicopter. Really great. [endtext]
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