GB 50015-2019 第5.2.1条
| Design storm return period for roof rainwater: 10 years for general buildings, 50 years for important public buildings (including hotels), and 50 years for sunken plazas.
| Design storm return period for roof rainwater: 10 years for general buildings, 50 years for important public buildings (including hotels), and 50 years for sunken plazas.
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