Boring type mining machine having ripper cutter chains guided between boring heads,申请号US19650494632-传众专利搜索

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发明名称	Boring type mining machine having ripper cutter chains guided between boring heads
摘要
申请公布号	US3360299(A)	申请公布日期	1967.12.26
申请号	US19650494632	申请日期	1965.10.11
申请人	WESTINGHOUSE AIR BRAKE COMPANY	发明人	ARNDT CHARLES J.
分类号	E21C27/10	主分类号	E21C27/10
代理机构		代理人
主权项
地址

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