常見例句Gutters or channels on each side of a ship's keelson that drain bilge water into the pump well. 汙水道，通水孔船底龍骨兩側(cè)用來排汙水的水槽或水道As one can tell from the photos, I made just 6 frames and clamped them together with a keel and keelson and began planking. 從照片可知，我衹制作6個(gè)肋骨，用龍骨和內(nèi)龍骨把它們夾在一起，竝開始鋪板。a horizontal beam (or plate) connected to the top of a ship's vertical keel or to the keelson. 連接船衹的直立龍骨的頂部和內(nèi)龍骨的平板。detached keel and keelson 分離龍骨bilge keelson 舭內(nèi)龍骨middle line keelson 中內(nèi)龍骨 返回 keelson