Improvements in the production of bent tubes,申请号GB19400011921-传众专利搜索

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发明名称	Improvements in the production of bent tubes
摘要
申请公布号	GB543362(A)	申请公布日期	1942.02.23
申请号	GB19400011921	申请日期	1940.07.19
申请人	BLACKBURN AIRCRAFT LIMITED;DAVID BRUCE NIVISON	发明人
分类号	B21D7/00	主分类号	B21D7/00
代理机构		代理人
主权项
地址

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