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A.Do not exceed rated load capacity of crane and container spreader or slings
B.During any cargo handling operation，the safety of personnel is paramount
C.Cargo handlers must be outfitted with adequate protection from personal injury
D.All the above

A.The discharge is slow due to the size of the cargo and all the cranes working together
B.The cargo discharge can be accomplished with controlled pendulation
C.The cargo discharge can be performed in port or at anchor
D.The cranes enable the handling of heavy cargos without shoreside assistance