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发明名称
Power unit
摘要
申请公布号
US2191191(A)
申请公布日期
1940.02.20
申请号
US19390251510
申请日期
1939.01.18
申请人
BEAVER PIPE TOOLS, INC.
发明人
PEALER ROBERT B.
分类号
B23G1/22
主分类号
B23G1/22
代理机构
代理人
主权项
地址
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