由于需要的性质是如此特别，工具钢通常使用冶金质量控制的方法在电炉中熔化。
Since the property requirements are so special, tool steel are usually melted in electric furnace using careful metallurgical quality control.
由于需要的性质是如此特别，工具钢通常使用冶金质量控制的方法在电炉中熔化。
Since the property requirements are so special, tool steel are usually melted in electric furnace using careful metallurgical quality control.
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