想請教有關氦氣使用及其特點的問題 - 社會議題
By Regina
at 2007-11-10T00:00
at 2007-11-10T00:00
Table of Contents
一般在檢測洩漏時都會使用氦氣,為什麼要用氦氣,其特點是什麼??(誰有在工作上用到氦氣測漏儀的呢??請幫幫忙!!)
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社會議題
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By Skylar DavisLinda
at 2007-11-10T18:11
at 2007-11-10T18:11
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