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发明名称
Propeller attachment
摘要
申请公布号
US1874213(A)
申请公布日期
1932.08.30
申请号
US19310524982
申请日期
1931.03.24
申请人
WALLACE FRIEND E
发明人
WALLACE FRIEND E.
分类号
B63H1/20
主分类号
B63H1/20
代理机构
代理人
主权项
地址
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