{HEAD ~ Each push button} has {TAIL ~ a carriage} adapted to be fitted on one side with an optional leaf spring contactor engageable with fixed contact members 
has
{ HEAD ~ Each push button } has { TAIL ~ a carriage } adapted to be fitted on one side with an optional leaf spring contactor engageable with fixed contact members
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 OTH OTH OTH OTH OTH OTH