{TAIL ~ The maximum amount} of flexure of the internal gear 3 is determined by the size of the gap 23 in {HEAD ~ the radial direction} 
{ TAIL ~ The maximum amount } of flexure of the internal gear 3 is determined by the size of the gap 23 in { HEAD ~ the radial direction }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD