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關注：1
2013-05-23 12:21
求翻譯：Normally, the duct bores 孔洞 are to be temporarily protected by sealing ends, which are finally replaced, by sealing plugs. 密封塞是什么意思？ 待解決
 懸賞分：1
- 離問題結束還有
Normally, the duct bores 孔洞 are to be temporarily protected by sealing ends, which are finally replaced, by sealing plugs. 密封塞
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