... 船泊立案证书 ships certificingested of registry 航海日记 ships log 我不知道物流网船员名册 muster-roll ...
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Electromagnetic Log is a relatively Log, and for single Log, the only measurement of the vertical ship relative speed of water, range, not conducive to the manipulation of large ships.
电磁计程仪是一种相对计程仪，且为单轴计程仪，只能测量船舶相对水的纵向航速、航程，不利于大型船舶的操纵。
Modern ships use the electromagnetic Log have been less.
现代船舶上使用电磁计程仪的已较少。
The Danish findings are based on nature's own climate "archive" - ice cores and tree rings - as well as ships' log books and harbour records.
这项丹麦发现是以自然本身气候的“档案”，冰核、树木年轮、船只航海日志和港口记录为基础。
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