GB 50015-2019 第4.9.2条
- **** | Swimming pools shall use a recirculating filtration water supply system; filter velocities: quartz sand filters ≤25 m/h, diatomaceous earth filters ≤10 m/h.
- **** | Swimming pools shall use a recirculating filtration water supply system; filter velocities: quartz sand filters ≤25 m/h, diatomaceous earth filters ≤10 m/h.
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