| 摘要 |
The multi-paned window is provided with an insulating element made of plastic film. The film is bi-axially stretched within the window frame by a clamping means in a uniform manner. The clamping means employs elongated elements which cooperate with each side of the film along an arcuate line so that in a clamped state, the film is caused to stretch bi-axially. The elongated elements may fit together as a frame or may be separate from each other. |
