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发明名称
Hollow engraving points
摘要
申请公布号
US3378926(A)
申请公布日期
1968.04.23
申请号
US19670641422
申请日期
1967.05.19
申请人
ROBERT H. SICKING
发明人
SICKING ROBERT H.
分类号
G03D15/00
主分类号
G03D15/00
代理机构
代理人
主权项
地址
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