Mining machine rotary boring head having radially adjustable cutting arms,申请号US19560621678-传众专利搜索

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发明名称	Mining machine rotary boring head having radially adjustable cutting arms
摘要
申请公布号	US2798708(A)	申请公布日期	1957.07.09
申请号	US19560621678	申请日期	1956.11.13
申请人	GOODMAN MANUFACTURING COMPANY	发明人	THASSY MICHAEL G.
分类号	E21C27/22	主分类号	E21C27/22
代理机构		代理人
主权项
地址

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