| 摘要 |
<p>The invention relates to a form part for a ventilation ductwork system, comprising a substantially integral duct wall (2) surrounding a flow passage. The installation of cleaning doors required for the cleaning of the ductwork system can be carried out more easily and the air-tightness of the doors can be improved in such a manner that a piece (3) is detached from the duct wall (2) of the form part according to the invention for forming a cleaning opening in the ventilation ductwork system, and said detached piece (3) of the duct wall is supported by means of a gasket to the opening in the duct wall (2) so as to form a cleaning door.</p> |
