Therefore, it is possible to realize a method for transmitting {HEAD ~ an ultrasonic wave}, the method having {TAIL ~ a high flexibility} of detection area control 
Therefore , it is possible to realize a method for transmitting { HEAD ~ an ultrasonic wave } , the method having { TAIL ~ a high flexibility } of detection area control
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH