A、a message about the safety of navigation will follow
B、a message of an urgent nature about the safety of a ship will follow
C、the sender is in distress and requests immediate assistance
D、you should secure your radiotelephone
A、a message about the safety of navigation will follow
B、a message of an urgent nature about the safety of a ship will follow
C、the sender is in distress and requests immediate assistance
D、you should secure your radiotelephone
时间:2022-01-03 23:03 关键词: 安全用语
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