99色精品-9色在线-99色在线-99色视频 国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精

單項(xiàng)選擇題

The term "load on top" is used on many crude oil carriers, is to provide a method for ().

A.calculating the ullage in the cargo tanks
B.loading ballast by gravity
C.the loading of new cargo into the slop tank as a procedure to minimize pollution
D.calculating the ratio of cargo expansion in a cargo tank

微信掃碼免費(fèi)搜題