• ZSFL预作用装置公司生产报警出水口上端配接套同规格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.

    youdao

  • ZSFL预作用装置公司生产报警出水口上端配接套同规格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.

    youdao

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