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<p>in many industries including steel and aluminum construction, metallurgy, manufacturing, <a href="page.php?w=aerospace">aerospace</a>, <a href="page.php?w=automotive">automotive</a> and other <a href="page.php?w=transportation">transportation</a> sectors.</p>

<p><big> History </big></p>
<p>The first efforts to use ultrasonic testing to detect flaws in solid material occurred in the 1930s.   On May 27, 1940, U.S. researcher Dr. <a href="page.php?w=Floyd_Firestone">Floyd Firestone</a> of the <a href="page.php?w=University_of_Michigan">University of Michigan</a></p><p>
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