A、Mate's license
B、Restricted radiotelephone operator permit
C、Second-class radio operator's license
D、Seaman's document
A、Mate's license
B、Restricted radiotelephone operator permit
C、Second-class radio operator's license
D、Seaman's document
时间:2022-01-03 23:45 关键词: GPS、DF及LC的使用
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