n. chronometer
无线电经纬仪 radiotheodolite
经纬仪导线 [测] theodolite traverse
经纬仪导线站 transit traverse station
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这个问题直到十八世纪发明了航海经线仪才得以解决。
The problem was not solved completely until the invention of the marine chronometer in the eighteenth century.
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