A.40ft B.20ft C.20m D.40m
单项选择题The safe working load of the derrick is ().
A.5 tons B.5 metres C.5 feet D.5 mile
单项选择题Close the (), please.
A. hatch coamings B. hatch covers C. hatch beams D. hatch openings
单项选择题()is cargo handling gear.
A.Derrick B.Crane C.A+B D.Anchor
单项选择题Our ship is ()with automatic hatch covers.
A.equipped B.equip C.equipping D.to equip
单项选择题The cargo gear includes().
A. derrick, winches, cargo ropes and wires B. derricks, windlass, capstan C. hatch covers, derricks, windlass D. cranes, hatches, lashing wires