According to the above method, the transmission surfaces of the first combination of transmission elements vibrate in {HEAD ~ a substantially same phase} so that the transmission surfaces of the first combination vibrate in {TAIL ~ an integral manner} 
According to the above method , the transmission surfaces of the first combination of transmission elements vibrate in { HEAD ~ a substantially same phase } so that the transmission surfaces of the first combination vibrate in { TAIL ~ an integral manner }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL