This spring 31, the function of which will be explained below, is corrugated in the axial direction so that it bears, on the one hand, on the thrust surface 29 of the fly weights 22 and, on the other hand, on {TAIL ~ the base} of the groove 30 of {HEAD ~ the nut} 18 
This spring 31 , the function of which will be explained below , is corrugated in the axial direction so that it bears , on the one hand , on the thrust surface 29 of the fly weights 22 and , on the other hand , on { TAIL ~ the base } of the groove 30 of { HEAD ~ the nut } 18
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