overboardadv.自船上落下;在船外
overboard steam drai蒸汽排出
overboard steam drain蒸汽排出
overboard discharge pipe排卸管
overboard discharge line舷外排出管
overboard deck discharge甲板舷侧排出口
overboard discharge valve排卸阀
overboard urinal drain line小便池舷外疏泄管
overboard toilet drain line盥洗污水舷外泄管
Overboard blow-off valve for boiler锅炉舷外排污阀