| 摘要 |
In the Patent Claims P 3107917.2, safety locking is carried out by providing grooves (Figure 4, No. 4 and 2 No. 4) and providing spring arrangements (Figure 2, No. 9 and 4 No. 9) on screw bolts, or on their nuts, which can prevent unintentional loosening of these parts. <IMAGE>
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