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序言在实践中渗碳淬火零件,除规定表面淬火硬度外,一般要规定渗碳硬化深度(EHT)而不是渗碳层深度(A_t),渗碳层深度决定
Preface In practice, carburizing and quenching parts, in addition to the provisions of surface hardening hardness, the general provisions of the hardening depth of hardening (EHT) rather than carburizing depth (A_t), carburizing depth