The remote control for a fixed fire extinguishing system should be（）.<br>A:painted red and labeled<br>B:concealed from the crew<br>C:protected by plexiglass<br>D:padlocked

The remote control for a fixed fire extinguishing system should be（）.
A:painted red and labeled
B:concealed from the crew
C:protected by plexiglass
D:padlocked

出自：海船船员证

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