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发明名称
Perfectionnements aux flotteurs indiquant une période d'oscillation lente pour instruments indicateurs
摘要
申请公布号
FR847586(A)
申请公布日期
1939.10.12
申请号
FRD847586
申请日期
1938.12.15
申请人
SPERRY PRODUCTS, INC.
发明人
分类号
G01C17/00
主分类号
G01C17/00
代理机构
代理人
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