| 摘要 |
<p>The rainwater drainage device has two perforated hollow sections (1) that are connected with each other through a connection structure (5). Two plate portions (6) are provided in the connection structure. The plate portions are connected by a connection tape. Each perforated hollow section is provided with a terminal portion. A closure cap (4) is arranged at an upper surface of the perforated hollow section.</p> |
