| 摘要 |
The threaded bolt ) can be pivoted partly in between the arms of the counterPiece (1) and thus lie in the longitudinal direction of the latter, and partly extend at right-angles out from the counterpiece and through the roof to hold the roof ladder firmly. The threaded bolt (5) is unsymmetrically placed relative to the centre of the counterpiece, and the counterpiece has a threaded socket (9) at a distance from the bolt (5) which accommodates a screw (14) which from the exterior is inserted through an aperture (13) in the roof (11) and fixed in the socket. |
