| 摘要 |
Levelling device for ceiling or wall casings 3 for electrical installations, where a ring, track, plate or the like 1 is provided with one or more holes which are designed for threaded connection with fixing screws 2 intended for a box liner 6 and arranged to be situated at an adjustable distance from the screw-fixing in the actual box 3 and to support the casing liner 6. <IMAGE> |
