| 摘要 |
<p>The invented exhaustion device nozzle /6/ of working devices, particularly for working masonry encompasses a working tool, such as a drill /10/, and is connected to a vacuum source having a tank for entrapping particles loosened during working. The exhaustion nozzle /6/ consists of at least two telescopic tubular parts /7, 8, 9/ inserted in each other and fastened on the working device co-axially with the working tool, particularly the drill /10/, whereby in a wall of one of the tubular part /7, 8, 9/ there is performed an exhaustion hole /11/ being interconnected with an exhaustion socket /14/ and intended for coupling a hose of exhaustion mechanism with the vacuum source.</p> |
