said {TAIL ~ lever member} having an elongate passageway therewithin extending substantially throughout the entire length thereof from adjacent said one pivoting extremity thereof to {HEAD ~ adjacent} said free extremity thereof, 
said { TAIL ~ lever member } having an elongate passageway therewithin extending substantially throughout the entire length thereof from adjacent said one pivoting extremity thereof to { HEAD ~ adjacent } said free extremity thereof ,
OTH TAIL 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 HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH