Күн бұрынFire Alarm Test #43 Рет қаралды 50,767SafeTech 1 1 Signal testing on an Autocall MD 8-zoned system in a church. System could be expanded up to 12 zones for a single panel.Follow me on Twitter & Instagram: TWITTER: / safetech0415 INSTAGRAM: / officialsafetech Жүктеу
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