parallel waterline

例句：

1. 1. The ship's hull was designed to withstand the pressure of the ocean, parallel waterline.
   船体设计能够承受海洋压力，平行水线。
2. 2. The engineer carefully measured the distance between the two parallel waterlines.
   工程师仔细测量了两条平行水线之间的距离。
3. 3. The construction crew had to make sure that the parallel waterlines were properly aligned.
   施工团队必须确保平行水线正确对齐。