GB 50261-2017 第6.2.3条
| **** | During commissioning of the wet alarm valve assembly, the hydraulic alarm bell should sound within 5–90 s, and the pressure switch should actuate and provide feedback signal. |
| **** | During commissioning of the wet alarm valve assembly, the hydraulic alarm bell should sound within 5–90 s, and the pressure switch should actuate and provide feedback signal. |
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