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经营范围
发明名称
PROCESS OF BLACK CHROMIUM PLATING
摘要
申请公布号
US3620935(A)
申请公布日期
1971.11.16
申请号
USD3620935
申请日期
1969.11.24
申请人
KEWANEE OIL CO.
发明人
KARL S. WILLSON
分类号
C25D3/08;(IPC1-7):C23F17/00;C23B5/06;C23B5/50
主分类号
C25D3/08
代理机构
代理人
主权项
地址
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