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发明名称
Composition to blacken surfaces of copper and of alloys containing copper
摘要
申请公布号
US2481854(A)
申请公布日期
1949.09.13
申请号
US19460647659
申请日期
1946.02.14
申请人
ENTHONE, INC.
发明人
MACMAHON JAMES DOUGLAS
分类号
C23C22/63
主分类号
C23C22/63
代理机构
代理人
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