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经营范围
发明名称
Earth induction compass
摘要
申请公布号
US2620570(A)
申请公布日期
1952.12.09
申请号
US19500166438
申请日期
1950.06.06
申请人
GIORGIO MINAS
发明人
MINAS GIORGIO
分类号
G01C17/30
主分类号
G01C17/30
代理机构
代理人
主权项
地址
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