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经营范围
发明名称
Cribbing
摘要
申请公布号
US1996774(A)
申请公布日期
1935.04.09
申请号
US19300477446
申请日期
1930.08.23
申请人
LENA SHIMEK
发明人
POWERS GEORGE W.
分类号
E02D29/02
主分类号
E02D29/02
代理机构
代理人
主权项
地址
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