| 摘要 |
<p>The covering has a tubular section (1) made of laminar material e.g. foil or fabric. The tubular section is folded such that the tubular section forms a cylindrical circumferential part (2) and a fold (3). A detachable connection is provided between longitudinal points of a circumference of the tubular section spaced at a distance from each other, where the longitudinal points form the circumferential part. The circumferential part bridges the fold, where the fold is formed over length of the tubular section. The detachable connection extends over an entire length of the circumferential part.</p> |
