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发明名称
Compass for orientation
摘要
申请公布号
US1944104(A)
申请公布日期
1934.01.16
申请号
US19320585136
申请日期
1932.01.06
申请人
ALBERT NIEDERMANN
发明人
NIEDERMANN ALBERT
分类号
G01C17/00
主分类号
G01C17/00
代理机构
代理人
主权项
地址
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