| 摘要 |
<p>The present utility model relates to roofing sheet comprising an elongated body having a series of trapezoidal-shaped major ridges being alternated with at least three trapezoidal-shaped minor ridges, a male major ridge disposed at one longitudinal side of said body provided with an abbreviated tip, and a female major ridge disposed at the other longitudinal side of said body provided with a horizontal extension outwardly extending thereon.</p> |
