marine chronometer

... 航海时计 marine chronometer; nautical chronometer 停港航海时间比 ratio of port time to sea time 大上海时代广场 shanghai times square ...

 nautical chronometer

... isotopic chronometer同位素计时仪;原子针 nautical chronometer航海时计 chronometer watch天文比对表;精密记时计;[天]天文表 ...