| 摘要 |
<p>Bolt comprises a hard PVC body at the rear end of which is a stabiliser. Near the front end is a disc-shaped guide. In front of the guide is a soft PVC suction base which extends through the disc-shaped guide with part of its material and which is permanently fixed to the body of the bolt behind the guide. The suction base pref. extends through several holes distributed over the circumference of the guide. The body of the bolt is pref. rod-shaped and extends forwards slightly further than the guide, where it is surrounded by a cylindrical attachment of the suction base and abuts against the base with one face, while the base behind the guide has a thicker zone.</p> |
