单选题（）are used to ensure that ships don’t discharge oil when pumping out oily water from any oil contaminated space.ABoilerBIncineratorCOily water separatorDSewage treatment unit
单选题
（）are used to ensure that ships don’t discharge oil when pumping out oily water from any oil contaminated space.
A
Boiler
B
Incinerator
C
Oily water separator
D
Sewage treatment unit
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