guiding means in said housing for guiding {HEAD ~ each} of said push buttons for sliding movement in a predetermined direction between {TAIL ~ forwardly extended and rearwardly depressed positions}, 
guiding means in said housing for guiding { HEAD ~ each } of said push buttons for sliding movement in a predetermined direction between { TAIL ~ forwardly extended and rearwardly depressed positions } ,
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH