| 摘要 |
<p>A tube (1) of fabric reinforced PVC for suspension from a ceiling of a tunnel or the like comprises a tube shaped fabric with an internal and an external coating of PVC. The internal coating is of black, electrically conducting PVC and the external coating is of white, electrically isolating PVC. The tube (1) is provided with an external, longitudinal strip (2) of black, electrically conducting PVC in contact with the internal coating. The strip (2) is earthed by a suspension arrangement (3-5) for the tube (1) to the ceiling.</p> |
