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发明名称
Improvements in or relating to tachometer devices
摘要
申请公布号
GB869135(A)
申请公布日期
1961.05.31
申请号
GB19560028181
申请日期
1956.09.14
申请人
NATIONAL RESEARCH DEVELOPMENT CORPORATION
发明人
WILLIAMS FREDERIC CALLAND
分类号
G01P3/44
主分类号
G01P3/44
代理机构
代理人
主权项
地址
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