{HEAD ~ a linkage assembly} including {TAIL ~ a link} operable to transfer forces between a contact arm and an actuator lever 
{ HEAD ~ a linkage assembly } including { TAIL ~ a link } operable to transfer forces between a contact arm and an actuator lever
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH