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发明名称
Testing instrument
摘要
申请公布号
US1759479(A)
申请公布日期
1930.05.20
申请号
US19220570506
申请日期
1922.06.23
申请人
CHAPMAN PENROSE E
发明人
CHAPMAN PENROSE E.
分类号
主分类号
代理机构
代理人
主权项
地址
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