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200余台热处理炉采用直接进给油气混合作在现场生产的气氛，进行渗碳、碳氮共渗和硬化处理。本文回顾了这种技术．并着重介绍了其处理优点和气氛生产中巨大的成本节约。
More than 200 heat treatment furnaces are directly fed with oil and gas mixture for on-site production, carburizing, carbonitriding and hardening treatment. This article reviews this technique. Highlighting the processing advantages and huge cost savings in the production of the atmosphere.