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