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概况工业设备大型化及现代尖端技术的发展对金属材料品种需要日益扩大,对大型毛坯重量的要求日趋增大,对冶金质量要求日益
Overview Large-scale industrial equipment and modern cutting-edge technology for the growing demand for varieties of metal materials, the requirements for large-scale rough growing, the increasingly demanding metallurgical quality