| 摘要 |
The device (1) has a screw (4) comprising a screw-base body (8) extending in a screwing direction (9) and an external thread (12) arranged on the base body. A screw-head (13) is arranged at an insertion end (14) of the base body, and a retaining disk (5) is connected with the screw-head. The disk has a side (16) with a contact surface for holding an insulation material (2). A cover (3) is arranged at another side (17) of the disk for covering the disk, where the disk is made from fire-proof material. The cover is made from plastic, cardboard or paper, and comprises a covering opening. |
