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发明名称
Great circle direction-keeping instrument
摘要
申请公布号
US2555328(A)
申请公布日期
1951.06.05
申请号
US19440517214
申请日期
1944.01.06
申请人
THE SPERRY CORPORATION
发明人
ESVAL ORLAND E.;WRIGLEY WALTER
分类号
G01C19/00
主分类号
G01C19/00
代理机构
代理人
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地址
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