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。
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。
Reattach cover plate to make an air and water tight seal.
重新固定盖板，并紧密密封防止空气和水通过。
Tight all closures and put the valve cover door on position before shipment.
运输前拧紧所有密封件，盖好阀门挡板。
The skin-tight elasticated fabric masks cover a swimmer's entire head and neck.
这种面罩能包住游泳者整个头部和脖颈，布料紧贴肌肤且有弹力。
Or use tight set cover, remove pipe shall be fitted on cylinder shaft.
或操纵紧定套、拆卸筒安装在圆柱轴上。
Or use tight set cover, remove pipe shall be fitted on cylinder shaft.
或操纵紧定套、拆卸筒安装在圆柱轴上。
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