| 摘要 |
PURPOSE: A duct combined with a gasket is provided to prevent a gasket from being separated from a duct although the pressure of a post exceeds fixed pressure by coupling flanges with the gasket. CONSTITUTION: A duct combined with a gasket(2) comprises the end of an opening area rolled outward. The end is overlapped. The end of the gasket is fixed inside a rolled space part(14). The gasket is formed of a flat body unit(20). The duck and the gasket are integrated with each other.
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