船首尾线(fore and aft line):当船正平时,船舶的首尾面与船舶地面真地平平面相交的直线。
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fore-and-aft line 艏艉线 ; 首尾线
fore-and aft line 首尾线
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A rig on a sailing ship that has quadrilateral and triangular sails set to the fore-and-aft line and that can be trimmed to leeward.
帆船上的装置,有安装在船头或船尾的三桅或四桅,且可调整到下风。
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