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发明名称
Driving mechanism for air propellers
摘要
申请公布号
US2297400(A)
申请公布日期
1942.09.29
申请号
US19390302869
申请日期
1939.11.04
申请人
ALBERT FRIEDRICH
发明人
FRIEDRICH ALBERT
分类号
B64D35/00
主分类号
B64D35/00
代理机构
代理人
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地址
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