A firemans outfit carried onboard cargo vessels, must have a （）.<br>A:canister-type gas mask<br>B:fresh-air breathing apparatus<br>C:self-contained breathing apparatus<br>D:combustible gas indicator

A firemans outfit carried onboard cargo vessels, must have a （）.
A:canister-type gas mask
B:fresh-air breathing apparatus
C:self-contained breathing apparatus
D:combustible gas indicator

出自：海船船员证

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