Tunnel boring machine having oppositely rotating tool holders on a rotating carrier,申请号US19580710539-传众专利搜索

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发明名称	Tunnel boring machine having oppositely rotating tool holders on a rotating carrier
摘要
申请公布号	US3004753(A)	申请公布日期	1961.10.17
申请号	US19580710539	申请日期	1958.01.22
申请人	LEOPOLD SIK SIGMUND	发明人	SIK SIGMUND LEOPOLD
分类号	E21D9/10	主分类号	E21D9/10
代理机构		代理人
主权项
地址

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