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关注：1
2013-05-23 12:21
求翻译：目前建筑设计规范中规定使用的防火门仅有甲级、乙级和丙级，是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
目前建筑设计规范中规定使用的防火门仅有甲级、乙级和丙级，
问题补充： |
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2013-05-23 12:21:38
Architectural design standards currently require the use of fire doors in only Category A, B and C,
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2013-05-23 12:23:18
In the current architectural norms regulating the use of fire door is only a Category A, B and C-level.
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2013-05-23 12:24:58
At present in the architectural design standard stipulated the use the fire door only has a-grade, the grade B and the third class,
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2013-05-23 12:26:38
Current architectural design specifications used in fire doors only grade a, grade b and of class c,
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2013-05-23 12:28:18
In the current architectural design specifications require the use of fire doors only class a, class b and class c,
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