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关注：1
2013-05-23 12:21
求翻译：to achieve the mass per unit area of the floors, coverings and ceilings as detailed for a Type 1 separating floor as defined in Approved Document E (see Section 1.2.5).是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
to achieve the mass per unit area of the floors, coverings and ceilings as detailed for a Type 1 separating floor as defined in Approved Document E (see Section 1.2.5).
问题补充： |
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