| 摘要 |
A torsion free preferably harp shaped shacle, applicable as a connection link for theft preventive arrangements, borrowing its unique properties from an universal joint construction, avoiding any moment resulting from external forces, casu quo dismantling by malefactors. The method of hindering destruction is essential for this invention. Even grinding- or sawing machines cannot cause failing apart of the shacle, due to special eternals, spinning around when touched by any tool. |
