(b)该船舶已开始装配，而装配量至少为50公吨或所有结构村料估计重量的1%，取其小者；“首垂线”(forward perpendicular) 指本规例所界定的船舶长度的最前端；
基于78个网页-相关网页
... perpendicular magnetization 垂直磁化,横向磁化... forward perpendicular 艏垂线 perpendicular distance 垂(直)距(离)...
基于56个网页-相关网页
sheer at forward perpendicular 首舷弧 ; 首尾舷弧
draft at forward perpendicular 首垂线处吃水
From the side, the front line is perpendicular and straight, coinciding with the maxillary edge or slightly projected forward.
从侧面看，前行是垂直而直，与上颌骨边缘或稍向前预测相吻合。
The powered transition took about 20 seconds, and, if needed, the pilot could hand-crank the wings into the more forward position (more perpendicular to the fuselage) for landing.
该驱动过渡约需20秒，而且如果需要，飞行员可以手工曲柄到更多的前沿阵地降落（更多垂直于机身）的翅膀。
The Terrier's legs should be carried straight forward while traveling, the forelegs hanging perpendicular and swinging parallel with the sides, like the pendulum of a clock.
该梗犬在行进中要求腿部笔直向前，前腿垂直悬起，如同钟摆般向身体两侧平行摆动。
应用推荐