GB 50015-2019 第4.9.10条
- **** | The swimming pool shall be provided with an emergency drain-down device; the drain-down time should not exceed 4 h, and the discharge shall be connected to the drainage system or stormwater system.
- **** | The swimming pool shall be provided with an emergency drain-down device; the drain-down time should not exceed 4 h, and the discharge shall be connected to the drainage system or stormwater system.
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