| 摘要 |
<p>The plastics retractable venetian shutter blind has double bladed horizontal foils that can be moved vertically closer or further apart to regulate the amount of light passing through. The foils (3) have a tubular central portion (5) to take reinforcement and two wings, one front, one back both always vertical to stop the light. The two part profiles (7, 8) hold hooks (6) which are locked onto the foils by a ratchet mechanism by the projection (9). The walls (12, 13) of one hook enclose the bottom part of the hook above for guidance.</p> |
