| 摘要 |
A transparent sheet (50) is fixed in place across an existing window (54), to provide a secondary glazing arrangement, using devices (48, 49) each of which comprises a part (4) fixed to the sheet (50) and a part (2) which fixes e.g. to the window surround (52), the part (2) being connected to the part (4) by a ratchet means permitting the part (2) to be extended. |
