| 摘要 |
<p>1. A device to indicate the presence of buried pipe lines of the type comprising a longitudinal ribbon (1, 13) provided with division and/or partial division lines extending transversely, characterised in that the ribbon consists of at least two longitudinal strips (4, 5) demarcated by at least one longitudinal line (2) of lower strength, the division and/or partial division lines extending transversely across at least one of these longitudinal strips.</p> |
