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關注：1
2013-05-23 12:21
求翻譯：the initial step was the development of a hermetically sealed triggered switch to eliminate the need for a gas reservoir.是什么意思？ 待解決
 懸賞分：1
- 離問題結束還有
the initial step was the development of a hermetically sealed triggered switch to eliminate the need for a gas reservoir.
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