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发明名称
Improvements in or relating to tachometers
摘要
申请公布号
GB508506(A)
申请公布日期
1939.06.30
申请号
GB19370036277
申请日期
1937.12.31
申请人
PAUL KOLLSMAN
发明人
分类号
G01P3/46
主分类号
G01P3/46
代理机构
代理人
主权项
地址
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