GB 50261-2017 第5.6条
4. System pressure testing and flushing (****, Section **5.7**) are key procedures for ensuring the long-term reliable operation of the hotel's fire protection system and must not be omitted.
4. System pressure testing and flushing (****, Section **5.7**) are key procedures for ensuring the long-term reliable operation of the hotel's fire protection system and must not be omitted.
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