单项选择题

When（）clean ballast water from any vessel，an application shall be made to Harbor Authorities for approval.

A.discharging
B.recircling
C.loading
D.taking in

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When（）clean ballast water from any vessel，an applicatio...

单项选择题When（）clean ballast water from any vessel，an application shall be made to Harbor Authorities for approval.

A.discharging
B.recircling
C.loading
D.taking in

货物装卸货作业

When（）clean ballast water from any vessel，an application shall be made to Harbor Authorities for approval.