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发明名称
Liquid filled magnetic compass
摘要
申请公布号
US2775045(A)
申请公布日期
1956.12.25
申请号
US19540427636
申请日期
1954.05.04
申请人
AMERICAN MACHINE AND METALS, INC.
发明人
KADLEC LADISLAV
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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