| http://www.w3.org/ns/prov#value | - A Mill Test Report (MTR or CMTR) is a document that certifies the quality of the materials used by companies that manufacture, distribute or fabricate using use high grade steel or alloy product such as industrial pipe, valves, fittings, structural or plate steel and used in the construction of such things as pressure vessels, oil refineries, pipelines, bridges, office buildings, rail cars, ships
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