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发明名称
Improvements in or relating to helicopters
摘要
申请公布号
GB606420(A)
申请公布日期
1948.08.13
申请号
GB19450001173
申请日期
1945.01.15
申请人
HAROLD TOLMAN AVERY
发明人
分类号
B64C27/82
主分类号
B64C27/82
代理机构
代理人
主权项
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