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经营范围
发明名称
BLACKENING METHOD
摘要
申请公布号
GB1309725(A)
申请公布日期
1973.03.14
申请号
GB19710020774
申请日期
1971.04.19
申请人
NORTHERN METAL PRODUCTS INC
发明人
分类号
C23C8/10;(IPC1-7):C23F7/04
主分类号
C23C8/10
代理机构
代理人
主权项
地址
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