By regulation，orange smoke distress signals will expire not more than how many months from the date of manufacture?（）<br>A:24 months<br>B:36 months<br>C:42 months<br>D:54 months

By regulation，orange smoke distress signals will expire not more than how many months from the date of manufacture?（）
A:24 months
B:36 months
C:42 months
D:54 months

出自：海船船员证

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