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发明名称
Improvements relating to metal hardening processes
摘要
申请公布号
GB342940(A)
申请公布日期
1931.02.12
申请号
GB19300008621
申请日期
1930.03.18
申请人
THE SINGER MANUFACTURING COMPANY
发明人
分类号
C23C8/04
主分类号
C23C8/04
代理机构
代理人
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