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发明名称
Improvements in or relating to pitch control for helicopter rotors
摘要
申请公布号
GB635017(A)
申请公布日期
1950.03.29
申请号
GB19470017440
申请日期
1947.07.02
申请人
DOMAN-FRASIER HELICOPTERS, INC.
发明人
分类号
B64C27/54
主分类号
B64C27/54
代理机构
代理人
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