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发明名称
Electric meter
摘要
申请公布号
US1937451(A)
申请公布日期
1933.11.28
申请号
US19310569523
申请日期
1931.10.17
申请人
WILLIS JR HENRY F
发明人
JR. HENRY F. WILLIS,
分类号
G01R11/56
主分类号
G01R11/56
代理机构
代理人
主权项
地址
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