| 摘要 |
<p>Set of components for making up a drain trap consists of an integrated open-bottom U-channel as first component (11) combines with a second component (25) forming a bell float with a free edge reaching into the channel as fitted with guides for the float. A sealing ring on the first component (11) fits into a groove and the bell float should be hollow and there filled with material lighter than water.</p> |
