flush hatch cover
... flush fillet weld 平角焊 flush hatch cover 平式舱口盖 flush hatch 平舱口 ...
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平衡升降式舱口盖 balance lift type hatchcover
平式水密舱口盖 Flate-type watertight hatch covers
重力平衡式舱口盖 gravity balanced hatchcover
弹簧平衡式舱口盖 spring balanced hatch cover
平衡式移滚型舱口盖 balanlift type hatchcover
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