{HEAD ~ The pivot} 8 wherein {TAIL ~ said wedge} includes a pair of superposed wedges bearing on each other through two facing flat faces inclined to the axis of said axial housing 
wherein
{ HEAD ~ The pivot } 8 wherein { TAIL ~ said wedge } includes a pair of superposed wedges bearing on each other through two facing flat faces inclined to the axis of said axial housing
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH