| 摘要 |
<p>Plastics-sheathed, hollow, pref. aluminium profiles such as window frames are joined, pref. by welding. The shakes of flat angle pieces are fitted into can be fitted into the bevel to heat the plastics sheathing of the profiles. Pref. the slits form openings for the angle pieces, which are spaced apart by distance pieces , and the mirrors are moved by control between tensioners for the profiles.</p> |
