lubber-line校准线
compass lubber-line罗盘标线
Lubber's line留伯斯线;船首基线;校准线
lubber line error船首基线误差;艏线误差
lubber's line error船首基线误差
liquid oxygen lubber's line罗经上;船首基线
N(名词) a mark on a ship's compass that designates the fore-and-aft axis of the vessel 罗盘准线 (Also called lubber's line)