The ZSFL Pre-action Alarm System is made by equipping the top of the outlet of the deluge alarm valve with a wet-type alarm valve of the same size.
ZSFL预作用装置是在本公司生产的雨淋报警阀出水口上端配接一套同规格的湿式报警阀构成的预作用报警装置。
The ZSFL Pre-action Alarm System is made by equipping the top of the outlet of the deluge alarm valve with a wet-type alarm valve of the same size.
ZSFL预作用装置是在本公司生产的雨淋报警阀出水口上端配接一套同规格的湿式报警阀构成的预作用报警装置。
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