Ships and marine technology - magnetic compasses , binnacles and azimuth reading devices - class b 船和造船技术.磁罗盘罗盘座和方位读数装置. b级
I ships and marine technology - magnetic compasses , binnacles and azimuth reading devices - class b iso 613 : 2000 ; german version en iso 613 : 2001 船舶和航海技术.磁罗盘罗盘座和方位读数装置. b级