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