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发明名称
Compass
摘要
申请公布号
US2511688(A)
申请公布日期
1950.06.13
申请号
US19450583866
申请日期
1945.03.21
申请人
BEAUCHAMP REGINALD E
发明人
BEAUCHAMP REGINALD E.
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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