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船用轻型菌形通风筒
Light-weight mushroom ventilators for ship
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船用通风管路通舱管件
Ship' pipe penetrating piece for vent pipes
价格：￥0.00
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鹅颈式通风筒
Gooseneck ventilator
价格：￥0.00
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船用通风管路放水塞
Ships's drain plugs of vent pipes
价格：￥0.00
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船用半球形通风筒
Ships and marine technology -- Positioning of magnetic compasses in ships
价格：￥0.00
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