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发明名称
Aircraft sustained by a lifting screw
摘要
申请公布号
US1971734(A)
申请公布日期
1934.08.28
申请号
US19310537809
申请日期
1931.05.16
申请人
STALKER EDWARD A
发明人
STALKER EDWARD A.
分类号
B64C25/36
主分类号
B64C25/36
代理机构
代理人
主权项
地址
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