楼梯前室净高一般是多少？ [课程编码3796]

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楼梯前室净高一般是多少？

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- P$ Y% L1 a5 K+ ]6 `梯段是2.2m，平台是2.0m。

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( ]2 Q! y4 ]& f# N  L1 B

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, I, B, P+ G7 Y7 ~依据出处待考证。

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