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发明名称
Perfectionnements apportés aux règles de dessinateur
摘要
申请公布号
FR980410(A)
申请公布日期
1951.05.11
申请号
FRD980410
申请日期
1948.12.13
申请人
发明人
CHAMBON MICHEL-GEORGES-JEAN PICARD DU
分类号
B43L7/00
主分类号
B43L7/00
代理机构
代理人
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