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发明名称
Compensating hair-spring for watches, chronometers and the like, and alloys therefor
摘要
申请公布号
GB648341(A)
申请公布日期
1951.01.03
申请号
GB19480002812
申请日期
1948.01.30
申请人
ERNEST DUBOIS
发明人
分类号
G04B17/22
主分类号
G04B17/22
代理机构
代理人
主权项
地址
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