... single pull hatch cover 单拉型舱口盖 ; 单拉开式舱盖 water tight hatch cover 水密舱口盖 wooden hatch cover 木质舱口盖 ...
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Flexibility and hosing test for small water tight hatch cover(water tight door and window).
水密小舱口盖（水密门、窗）启闭灵活性、冲水检查。
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Flexibility and hosing test for small watertight hatch cover (water tight door and window).
水密小舱口盖(水密门、窗)启闭灵活性、冲水检查。
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