| 摘要 |
<p>The rectangular sheets (3) can be joined in various ways as with a short perforated stretch at one end, a completely connected short area at one end, or short connections at both ends of a gap (2) which can be created in any suitable way. The sheets (3) are rolled up and accommodated in a cylindrical container. The central sheet (3) is slightly lifted in order to be gripped for pulling.</p> |
