{HEAD ~ The mutually oblique boundary walls} of the slot 36 on one hand and on {TAIL ~ the other hand} the converging walls of the cog 37 ensure proper operational alignment of the two tightening device components 34 and 35 and hence assembly errors shall be avoided 
{ HEAD ~ The mutually oblique boundary walls } of the slot 36 on one hand and on { TAIL ~ the other hand } the converging walls of the cog 37 ensure proper operational alignment of the two tightening device components 34 and 35 and hence assembly errors shall be avoided
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