| 摘要 |
<p>The complete assembly comprises both a sliding and fixed frame which has a section comprised of three parts, an external section an internal section and an intermediate section which are joined together by cross pieces fitting into grooves in the sections. The two panes of double glazing are mounted on friction rollers which fit in between the sections and run on the two top cross pieces. The panes are constrained to move between guide rails mounted in grooves in the outer sections and watertight fibrous strips mounted in grooves in the intermediate section.</p> |
