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发明名称
Portable power unit
摘要
申请公布号
US1890927(A)
申请公布日期
1932.12.13
申请号
US19300480173
申请日期
1930.09.06
申请人
BEVIER ABRAM M
发明人
BEVIER ABRAM M.
分类号
E21B3/02
主分类号
E21B3/02
代理机构
代理人
主权项
地址
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