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发明名称
Dial indicator having polarizing elements
摘要
申请公布号
US2603129(A)
申请公布日期
1952.07.15
申请号
US19470745267
申请日期
1947.05.01
申请人
DREYER JOHN F
发明人
DREYER JOHN F.
分类号
G02B27/28
主分类号
G02B27/28
代理机构
代理人
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