Method of and apparatus for mining,申请号US19350049782-传众专利搜索

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发明名称	Method of and apparatus for mining
摘要
申请公布号	US2182127(A)	申请公布日期	1939.12.05
申请号	US19350049782	申请日期	1935.11.14
申请人	SULLIVAN MACHINERY COMPANY	发明人	JOY JOSEPH F.
分类号	E21C27/12	主分类号	E21C27/12
代理机构		代理人
主权项
地址

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