IMPROVEMENTS IN OR RELATING TO YIELDABLE MINE ROOF SUPPORTS,申请号ZA19770005348-传众专利搜索

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发明名称	IMPROVEMENTS IN OR RELATING TO YIELDABLE MINE ROOF SUPPORTS
摘要
申请公布号	ZA7705348(B)	申请公布日期	1979.05.30
申请号	ZA19770005348	申请日期	1977.09.06
申请人	ATLAS COPCO AB	发明人	HERRON L
分类号	E21D15/00	主分类号	E21D15/00
代理机构		代理人
主权项
地址

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