| 摘要 |
In order to enable the filter mass, having poor flow properties, to be emptied by simple means and handling, a filter apparatus is provided with a perforated inner tube (9) which is shorter than the space filled by the filter material (16), the intermediate region formed being closed by an unperforated tube piece (13) conducted in the inner tube. The tube piece (13) can be provided with a draw-bar (14) which is conducted in the inner tube (9) or in its extension. <IMAGE> |
