| 摘要 |
<p>The plastic cup fits precisely into the service network and lies flush in the ceiling. The plastic cup for water inflow is cast into a concrete ceiling, and has a collar formed on at the top. Use is made of three or more plastics supports (20), with feet nailed to ceiling sheathing. A plug-in batten is formed lengthways on each, protruding in cross-section. Attachments are formed on the cup walling, directly below the collar (11), at equal angle intervals, each with a groove fitting a plug profile. This ensures accurate fitting in both directions.</p> |
