| 摘要 |
On heated-wedge welding apparatuses, the pressure rollers (3, 6, 7) for pressing plastic waterproofing membranes (2) against the warmed-up heated wedge (1) are in each case formed by a plurality of roller/ball bearings which are rotatably movable independently of one another and have in the region of the testing channel a spacing corresponding to the testing channel. <IMAGE> |
