The margin plate is the（）.

A.outboard strake of plating on each side of an innerbottom

B.outer strake of plating on each side of the main deck of a vessel

C.plate which sits atop the center vertical keel

D.uppermost continuous strake of plating on the shell of a vessel

过滤网（）应根据流量计测量室内转动部分和壳体之间的间隙，以及转动部分相互间的间隙和油品性质（粘度、杂质粒径等）而确定。

A.直径

B.数量

C.层数

D.网目的大小