UNDER LOAD ADVANCEABLE MINE ROOF SUPPORT,申请号USD3494135-传众专利搜索

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发明名称	UNDER LOAD ADVANCEABLE MINE ROOF SUPPORT
摘要
申请公布号	US3494135(A)	申请公布日期	1970.02.10
申请号	USD3494135	申请日期	1968.12.02
申请人	HANS JOACHIM VON HIPPEL	发明人	HANS JOACHIM VON HIPPEL
分类号	E21D23/06;E21D23/08;(IPC1-7):E21D15/45;E04G25/04;E21D23/18	主分类号	E21D23/06
代理机构		代理人
主权项
地址

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