单选题The system will include various （） such as low tank level alarms and remote operation of tank outlet valves in the events of a fire.ASwitchesBpanelsCalarm unitsDsafety devices
单选题
The system will include various （） such as low tank level alarms and remote operation of tank outlet valves in the events of a fire.
A
Switches
B
panels
C
alarm units
D
safety devices
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