法规对沿海一等轮机长参加航区扩大培训有什么要求？(船员职业常识百问百答14)
https://onvideo.ssrcdn.com/bs2/onVideo/skyfall/media/34252207046005217267487.mp4 腾讯https://v.qq.com/x/page/b35070513qb.html
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