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发明名称
Speed ratio indicating device
摘要
申请公布号
US2051018(A)
申请公布日期
1936.08.11
申请号
US19340717831
申请日期
1934.03.28
申请人
GENERAL ELECTRIC COMPANY
发明人
UMANSKY LEONID A.
分类号
B21B1/36;B21B37/46
主分类号
B21B1/36
代理机构
代理人
主权项
地址
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