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发明名称
Perfectionnements apportés aux diamants de gravure pour surfaces optiques, et aux dispositifs destinés à leur utilisation
摘要
申请公布号
FR944251(A)
申请公布日期
1949.03.31
申请号
FRD944251
申请日期
1942.11.07
申请人
LA RELIEPHOGRAPHIE
发明人
分类号
B23B27/20;B23Q1/48;B23Q17/24;B44B3/06
主分类号
B23B27/20
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代理人
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