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les languettes 20 terminées par les griffes 46 constituent ainsi des moyens de detrompage empêchant toute utilisation des moyens de fixation tels que le tirant 50 sur la figure 2.
the tongues 20 with the grips 46 on their ends then constitute means for avoiding mistakes, preventing any use of the fixing means such as the tie rod 50 in fig. 2.