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Simplified wide-range ultrasonic measurements using the sen..:

Seiichi Morokuma ; Kana Maehara ; Hikohiro Okawa...
http://www.jmuonline.org/article.asp?issn=0929-6441;year=2018;volume=26;issue=2;spage=100;epage=102;aulast=Morokuma.  , 2018