{HEAD ~ a plurality} of {TAIL ~ springs} disposed between the housing and the respective push buttons for biasing the respective push buttons toward their forwardly extended positions, 
of
{ HEAD ~ a plurality } of { TAIL ~ springs } disposed between the housing and the respective push buttons for biasing the respective push buttons toward their forwardly extended positions ,
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH