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发明名称
Screw propeller
摘要
申请公布号
US2215207(A)
申请公布日期
1940.09.17
申请号
US19390260247
申请日期
1939.03.07
申请人
OTTO BROCKHAUS
发明人
BROCKHAUS OTTO
分类号
B63H1/12
主分类号
B63H1/12
代理机构
代理人
主权项
地址
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