單項(xiàng)選擇題A bilge suction line,in a fishing vessel with more than 16 individuals aboard,must have a strainer with an open area not less than how many times the open area of the suction line?()

A.one
B.two
C.three
D.four


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1.單項(xiàng)選擇題Limber is a term associated with().

A.emergency gear
B.drainage
C.deck cargo storage
D.securing gear