无码高清视频|成人自拍视频|欧美成人午夜无码A片秀色直播|草美女视频网站|美女被操网站在线观看

單項(xiàng)選擇題

()refers to the depth of a vessel below the waterline,measured vertically to the lowest part of the hull,propellers or other reference points.

A.Free board
B.Stability height
C.Metacentric height
D.Draft

微信掃碼免費(fèi)搜題