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发明名称
Means for promoting screw propeller efficiency
摘要
申请公布号
GB332429(A)
申请公布日期
1930.07.24
申请号
GB19290024977
申请日期
1929.08.15
申请人
HENRY CONRAD HEIDE
发明人
分类号
B63H5/16
主分类号
B63H5/16
代理机构
代理人
主权项
地址
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