{HEAD ~ The support shaft} 50 defines {TAIL ~ an elongate slot} 52 longitudinally therealong for engaging the end of a spring, as to be described below 
defines
{ HEAD ~ The support shaft } 50 defines { TAIL ~ an elongate slot } 52 longitudinally therealong for engaging the end of a spring , as to be described below
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH