| 摘要 |
<p>Single to double glazing coversion assembly.. F1-. Comprises pane and frame. Frame has a web and a flange, pane being glude to flange. Alfternativiely, there are 2 flanges withpane glued between. Pane is preferably of glass or transparent plastic, frame preferably of plastic or metal, and glue of plastics.</p> |
