| 摘要 |
Bend for debouching structures of closed gas or oil appliances having an inner tube (1) for discharge of combustion air and an outer tube placed around the inner tube, the outer tube (12a,12b) being placed concentrically around the inner tube in order to define therewith an annular line for supply of combustion air to the gas or oil appliance, in which the inner tube and the outer tube have a fluently curved course in a main plane and in which only transverse to the main plane air guidance partitions (7) are present in the annular space, which guidance partitions substantially follow the curve of the bend. <IMAGE> |
