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Ultrasonic Thickness Testing for Gold
Автор: Gold Stackers
Загружено: 2012-04-03
Просмотров: 50962
Описание:
Using an ultrasonic thickness gauge to measure the thickness of a Perth Mint gold bar based on the expected velocity of sound through gold, which is 3240m/s. If this bar had any inclusions such as tungsten with a higher velocity (i.e. 5170m/s), it would have given a thinner reading than actual.
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