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发明名称
Helicopter
摘要
申请公布号
US2420823(A)
申请公布日期
1947.05.20
申请号
US19430506565
申请日期
1943.10.16
申请人
HAYS RUSSELL R
发明人
HAYS RUSSELL R.
分类号
B64C27/82
主分类号
B64C27/82
代理机构
代理人
主权项
地址
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