| 摘要 |
The invention relates to a cleanout door, which in the form of a plug 1 is inserted into a tube in a ventilation system. The plug 1 has locking means 7-12 for retaining the plug 1 inserted into a tube. The locking means 7-12 is situated between the ends of the plug 1, and refractory material 6 is arranged between the inner end and the locking means 7-12 of the plug 1. <IMAGE> |
