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Sagot :
Area alarm panels for medical gas systems shall indicate when the line pressure in the area being monitored increase or decrease by 20% percent.
What are alarm panels?
Almost every aspect of your security system is controlled by an alarm panel: The system is armed and disarmed.
When an alarm is triggered, a siren sounds and the monitoring center is notified. Shows system status, lets you change system settings, and lets you add new security devices.
Thus, the correct option is 20%
Learn more about alarm panels
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