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发明名称
Method of fabricating contra-propellers
摘要
申请公布号
US1808151(A)
申请公布日期
1931.06.02
申请号
US19300488760
申请日期
1930.10.15
申请人
UNITED DRY DOCKS, INCORPORATED
发明人
WISEMAN JOHN T.
分类号
B63H1/28
主分类号
B63H1/28
代理机构
代理人
主权项
地址
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