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Volmetric Intrusion Detection Systems Are Photoelectric, Acoustical-Seismic, Ultrasonic, and Microwave

Question 11

Multiple Choice

Volmetric intrusion detection systems are photoelectric, acoustical-seismic, ultrasonic, and microwave. Which can only be used in windowless rooms?


A) Photoelectric
B) Acoustical-seismic
C) Ultrasonic
D) Microwave

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