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经营范围
发明名称
Perfectionnements aux bobines de films photographiques
摘要
申请公布号
FR709622(A)
申请公布日期
1931.08.11
申请号
FRD709622
申请日期
1931.01.19
申请人
发明人
BAXENDEN THOMAS GEORGE;COLLYEAR JOHN ROBERT
分类号
G03B17/30
主分类号
G03B17/30
代理机构
代理人
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