{HEAD ~ A toggle lever system} with {TAIL ~ links} 13a, 13b engages each of the bearings 11, 12 
with
{ HEAD ~ A toggle lever system } with { TAIL ~ links } 13a , 13b engages each of the bearings 11 , 12
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH