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Nodular cast iron is a kind of high strength cast iron material developed in 1950s. Its comprehensive properties are close to that of steel. Based on ...
time：2020-12-15 14:00:45 clicks：2627
Nodular cast iron is a kind of high strength cast iron material developed in 1950s. Its comprehensive properties are close to that of steel. Based on ...
time：2020-12-15 13:59:53 clicks：2640
