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。

youdao

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。

youdao

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。

youdao