| 摘要 |
The present invention relates to a sealing means for a duct connecting portion. The sealing means for a duct connecting portion comprising a front groove (11) and a rear groove (13), comprises: a steel plate (10); a sealing (21) to be inserted and attached into the front groove (11) of the steel plate; and a gasket to be inserted and attached into the rear groove (13). Therefore, the invention prevents an air leakage between the connecting portion of the duct even when a fire breaks out by an airtight action of the gasket and the sealing. |
