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发明名称
Frequency measuring apparatus
摘要
申请公布号
US2908865(A)
申请公布日期
1959.10.13
申请号
US19560582248
申请日期
1956.05.02
申请人
WESTINGHOUSE AIR BRAKE COMPANY
发明人
CAMPBELL RICHARD D.
分类号
G01R23/09
主分类号
G01R23/09
代理机构
代理人
主权项
地址
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