IMPROVEMENTS IN OR RELATING TO MINE ROOF SUPPORTS,申请号ZA19710006473-传众专利搜索

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发明名称	IMPROVEMENTS IN OR RELATING TO MINE ROOF SUPPORTS
摘要
申请公布号	ZA7106473(B)	申请公布日期	1972.06.28
申请号	ZA19710006473	申请日期	1972.09.27
申请人	FLETCHER SUTCLIFFE WILD LTD	发明人	SMITH D
分类号	E21D	主分类号	E21D
代理机构		代理人
主权项
地址

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