超聲波流量計的歷史（1） 1928年德國人研制成功第一臺超聲波流量計，并取得了專利。至今超聲波流量計以有75年歷史（2）1955年首先應用于馬克森（MAXSON）流量計測量航空燃燒油，這是一種基于聲循環法的兩組探頭（換能器）組成的液體流量計（3）1958年A.L.H-ERDRICH等人發明折射式探頭，由于他們的研究可進一步消除由于管壁的交混回響所產生
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