菌形通风筒、鹅颈式通风筒、百叶窗、防浪防雾型、水密加盖型、无门水密型、烟囱可闭型

• Mushroom Shape Air Funne, Goose Neck Type Air Funne, Shutter, Wave and mist proof type, Watertight type with cover, Watertight type without door, Closable chimney type