| 摘要 |
A plate-shaped part is used with limited magnetic properties, with outer dimensions permitting its insertion in a rear position in the plastic pocket (1) in relation to the map sheet. It works in conjunction with a number of marking components (7,7',7"), each comprising a permanent magnet with comparatively strong magnetic adhesion properties, which permit adhesion against the plate-shaped part in a position located against the side of the pocket where the map sheet is located. The plate-shaped part comprises a plate or metal foil enclosed by two non-magnetic layers. The plate-shaped part is formed with a hand grip type engagement part (4), which extends out of the plastic pocket after complete insertion. |
