Vertical continuous drilling machine,申请号US19290414460-传众专利搜索

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发明名称	Vertical continuous drilling machine
摘要
申请公布号	US1877277(A)	申请公布日期	1932.09.13
申请号	US19290414460	申请日期	1929.12.16
申请人	DAVIS FRANK M	发明人	DAVIS FRANK M.
分类号	B23B39/16;B23Q7/00	主分类号	B23B39/16
代理机构		代理人
主权项
地址

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