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7 Januari 2012

  • 13.287 Januari 2012 13.28 beda riw +204 B Pembicaraan:Kemudi tukik←Membuat halaman berisi '1.how do you think a space elevator would work? 2.what could it be use for? 3.what technical challenges would it face? 4.how seriously do you think the concept of spac...'