oil-tight hatch cover
... one-piece hatch cover 整块式舱口盖 oil-tight hatch cover 油密舱盖 end-rolling hatch cover 纵向滚动式舱口盖 ; 纵向滚动舱口盖 ...
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油密舱口盖 oiltight hatch cover
圆锥形油密舱口盖 conic oiltight hatchcover
油密船舱盖装置 oiltight hatchcover
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