Drill together then: You don't need to create the vacuum, only i

来源: 666888999 于 2007-09-24 20:14:08 [] [旧帖] [给我悄悄话] 本文已被阅读： 次 (230 bytes)
density of the 'inflated body' is smaller than that of the air. For example, if the body is filled with hydrogen,it can be floated up, the volume is more than 54 cubic meters but much smaller than 54 cubic kilometers I believe:)

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• 是他们胃中的碳酸膨胀 -- 出不来氢气吧！ -500miles- ♂ 给 500miles 发送悄悄话 500miles 的博客首页 (0 bytes) () 09/25/2007 postreply 20:07:51

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