main-deck stringer主甲板边板

bridge deck stringer桥楼甲板边板

upper-deck stringer上甲板边板

deck stringer angle甲板边角材

main chain deck stringer主甲板缘

main deck stringer主甲板缘

Deck stringer plate甲板边板

deck stringer bar甲板边角材;甲板边角钢

deck stringer intermediate frame板边板

lower-deck stringer下甲板边板