| 摘要 |
In a spot-suction device (1) comprising a tubular suction arm (3) which extends between a connection member (8) and suction hood (15) and which may be set in position vertically (A) as well as horizontally (B), a piston-and-cylinder unit (23) is mounted in the interior of the suction arm between the latter and the connection member (8) in order to retain the suction arm in the desired set position in the vertical direction (A). |
