| 摘要 |
<p>The invention relates to apparatus for use when introducing gas bubbles into a liquid. The invention comprises device (1) for fastening a perforated aeration membrane (2) to an aerator base plate (3) as well as to an aerator base plate (3) therefor. The aerator base plate (3) has an undercut groove (4) in at least one rim region thereof, into which a locking body (7) fits clampingly, thereby clamping the membrane (2) in said groove (4), the locking body (7) has a generally circular cross-section, whilst the groove (4) has an at least substantially oval cross-section. The locking body (7) is designed to be generally cylindrical.</p> |
