Improvements in air screw propellers,申请号GB19370022976-传众专利搜索

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发明名称	Improvements in air screw propellers
摘要
申请公布号	GB478054(A)	申请公布日期	1938.01.11
申请号	GB19370022976	申请日期	1937.08.21
申请人	SOCIETA ANONIMA ALFA ROMEO	发明人
分类号	B64C11/34	主分类号	B64C11/34
代理机构		代理人
主权项
地址

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