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发明名称
METHOD AND MEANS FOR PROMOTING PROPELLER EFFICIENCY
摘要
申请公布号
CA301561(A)
申请公布日期
1930.07.01
申请号
CAD301561
申请日期
申请人
LEONE COSTANIEVICH
发明人
LEONE COSTANIEVICH
分类号
主分类号
代理机构
代理人
主权项
地址
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