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发明名称
POWDERLESS ETCHING
摘要
申请公布号
CA732142(A)
申请公布日期
1966.04.12
申请号
CAD732142
申请日期
申请人
PHOTO-ENGRAVERS RESEARCH
发明人
MARVIN C. ROGERS;PAUL F. BORTH
分类号
主分类号
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代理人
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