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上海市机械制造工艺研究所和太仓阀门厂进行了可控硅中频加热对X195柴油机凸轮轴正时齿轮热轧的科研工作。他们用热轧
Shanghai Machinery Manufacturing Technology Institute and Taicang Valve Factory carried out a SCR frequency heating X195 diesel camshaft timing gear hot rolling research work. They use hot rolling