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Unread post by Rafe » Mon Dec 16, 2013 10:53 am
Unread post by nishat protyasha » Thu Dec 19, 2013 9:55 am
Unread post by samiul_samin » Tue Feb 05, 2019 10:50 am
Rafe wrote: ↑Mon Dec 16, 2013 10:53 am when a balloon goes to the sky it blast though the temparature and pressure reduce gradually.why?
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