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经营范围
发明名称
Perfectionnement à la compensation des compas magnétiques
摘要
申请公布号
FR980243(A)
申请公布日期
1951.05.09
申请号
FRD980243
申请日期
1942.05.06
申请人
发明人
BELLON FRANCOIS-BAPTISTIN
分类号
G01C17/38
主分类号
G01C17/38
代理机构
代理人
主权项
地址
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