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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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单选题（）are used to ensure that ships don’t discharge oil when pumping out oily water from any oil contaminated space.A
BoilerB
IncineratorC
Oily water separatorD
Sewage treatment unit
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单选题When discharging bilge water, which criteria must be observed?（）A
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单选题When the ships is going to enter into the harbor,（）.A
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pump out bilge waterC
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test emergency generator
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