| 摘要 |
<p>The device has a suction blower and a suction tube, where a replaceable filter cassette (5) is provided with an air intake. A suction tube (10) is coupled to the air intake, and a flexible hose (11) with its one end is connected with the cassette in such a manner that the hose surrounds the air intake, where the hose with its other end is suspended on the suction tube. The hose is folded together with the tube in an axial direction, where the hose is made of plastic foil or thin plastic fabric.</p> |
