A.is the S.W.L.of the crane
B.are the S.W.L. of the crane
C.the S.W.L. of the crane is
D.the S.W.L. of the crane are
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A.make command of
B.take command of
C.get command of
D.have command of
A.advised
B.to be advised
C.be advised
D.are advised
A.to
B.with
C.by
D.for
A.of
B.for
C.with
D.in
A.repair
B.repairing
C.to repair
D.be repaired
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The helm command PORT TWENTY means（）.
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（）is the act of allocating space to containers on board of a container ship in the order of the discharge ports.
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