单项选择题
A.a short length of line used for temporarily holding another line B.a snatch block for handling a topping lift C.an engine order telegraph D.the brake on a cargo winch
（）about 20 sq.m to be sand-blasted.A.The rusting areaB....
单项选择题（）about 20 sq.m to be sand-blasted.
A.The rusting area B.The rusted area C.The corroded area D.The corrosive area
