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经营范围
发明名称
Improvements in or relating to helicopters
摘要
申请公布号
GB630930(A)
申请公布日期
1949.10.24
申请号
GB19470013256
申请日期
1947.05.16
申请人
UNITED HELICOPTERS, INC.
发明人
分类号
B64C27/54
主分类号
B64C27/54
代理机构
代理人
主权项
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