Tightness test ( opening and closing test, emergency opening and closing test ) for cargo hatch cover.

货舱舱口盖密性试验 ( 启闭试验 、 应急启闭试验 ).

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Tail rods also supplied as standard equipment to serve as position indicators and for emergency opening.

尾杆也作为标准配置,用于作为位置指示器,或用于紧急开启用.

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Equipped with emergency opening button.

具有手动紧急断开按钮功能.

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