求翻译：d) Are there permanent means (Ex: Fixed stairs and ladders) for access and egress from elevated storage and work surfaces?是什么意思？

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悬赏分：1 - 离问题结束还有

d) Are there permanent means (Ex: Fixed stairs and ladders) for access and egress from elevated storage and work surfaces?

问题补充：

匿名	2013-05-23 12:21:38 D）有永久的手段（如：接入和固定高架仓库及工作台面的出口楼梯和梯子）？

匿名	2013-05-23 12:23:18

匿名	2013-05-23 12:24:58

匿名	2013-05-23 12:26:38

匿名	2013-05-23 12:28:18

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