Method of making a hollow propeller blade,申请号US19380194330-传众专利搜索

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发明名称	Method of making a hollow propeller blade
摘要
申请公布号	US2231772(A)	申请公布日期	1941.02.11
申请号	US19380194330	申请日期	1938.03.07
申请人	WYMAN-GORDON COMPANY	发明人	NELSON JOHN H.
分类号	B21K3/04	主分类号	B21K3/04
代理机构		代理人
主权项
地址

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