Poling plate and its method of application,申请号US19320625762-传众专利搜索

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发明名称	Poling plate and its method of application
摘要
申请公布号	US2019295(A)	申请公布日期	1935.10.29
申请号	US19320625762	申请日期	1932.07.29
申请人	JOHN DOLDER	发明人	DOLDER JOHN
分类号	E21D11/10	主分类号	E21D11/10
代理机构		代理人
主权项
地址

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