短語詞組短語depth h of hardening 硬化深層depth of hardening test 硬化層深度depth of hardening layer 強(qiáng)化層深度depth of hardening zone 淬硬層深度effective depth of hardening [機(jī)]有效淬硬深度and Effective Depth of Hardening 有效淬硬層深度regression of hardening depth 硬化深度的回歸 返回 depth of hardening