The emission of secondary (or fluorescent) X-rays from a material that has been excited by bombarding it with X-rays. The process can be used to determine the chemistry, and therefore the identity, of an unknown metal. This is a nondestructive test method.
Dropping oil prices and metal fabricating - by Dan Davis The drop in oil prices is not the end of the world, and it won't be the end of the world for the metal fabrication industry--at least for those not located in Texas, North Dakota, and western Canada.
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