Automatic fire dampers in ventilation systems are operated by use of（）. A:remotely operated valves B:fusible links C:C02 system pressure switches D:heat or smoke detectors

Automatic fire dampers in ventilation systems are operated by use of（）.
A:remotely operated valves
B:fusible links
C:C0₂ system pressure switches
D:heat or smoke detectors

出自：海船船员证

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