一位朋友的說法：美國的氦氣儲量很大，遠勝中國。氦氣是裂變產物，說明美國放射性元素多

來源: 周老大於 2024-08-23 10:05:40 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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