An immersion suit must be equipped with a(n)（）.<br>A:air bottle for breathing<br>B:orange smoke canister<br>C:whistle，light and retroreflective material<br>D:sea dye marker

An immersion suit must be equipped with a(n)（）.
A:air bottle for breathing
B:orange smoke canister
C:whistle，light and retroreflective material
D:sea dye marker

出自：海船船员证

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