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发明名称
Helicopter
摘要
申请公布号
US1807353(A)
申请公布日期
1931.05.26
申请号
US19300422969
申请日期
1930.01.23
申请人
RALPH TARSHIS
发明人
TARSHIS RALPH
分类号
B64C23/08
主分类号
B64C23/08
代理机构
代理人
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