মহাশূন্যে যেতে প্রধান বাধা কোনটি?

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    Oct 30, 2012 06:57 AM 2 Answers
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    AnswersBD Administrator Jul 20, 2014 04:17 PM
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    মাধ্যাকর্ষণ শক্তি।

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    AnswersBD Administrator Nov 10, 2012 01:57 PM
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    পৃথিবীর মাধ্যাকর্ষণ শক্তি।

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