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Pinch Roll Ger Box For Billet Mill

22. nomenclature.until about 1860 there were only three important classes of ironwrought iron steel and cast iron. the essential characteristic of wrought iron was its nearly complete freedom from carbon that of steel was its moderate carbon-content say between 0.30 and 2.2 which though great enough to confer the property of being rendered intensely hard and.

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