摘要 |
<p>The combined sun awning and intrusion prevention equipment comprises two hatches, which when open form a ventilated space. The heat generated below the top one has no access to the window frame, the bottom one forming a barrier. When shut, the two hatches shut the window frame completely, protecting against break-ins and also providing thermal and sound insulation. The system can also be used for a garage door.FL.</p> |