a raised framework around a hatchway on a ship to keep water out
coaming详细解释
coam.ing n.Nautical （名词）【航海】 A raised rim or border around an opening, as in a ship`s deck, designed to keep out water.舱口栏板：船的甲板上围绕舱口通道的高边缘栏板或边缘，用于防止水流入 来源：[Origin unknown] [来源不详]
