Air blast device,申请号US19470781940-传众专利搜索

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发明名称	Air blast device
摘要
申请公布号	US2502694(A)	申请公布日期	1950.04.04
申请号	US19470781940	申请日期	1947.10.24
申请人	ARMSTRONG COALBREAK COMPANY	发明人	ARMSTRONG FRANK H.
分类号	F42B3/06	主分类号	F42B3/06
代理机构		代理人
主权项
地址

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