SUPPORTS FOR UNDERGROUND EXCAVATIONS,申请号ZA19700000822-传众专利搜索

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发明名称	SUPPORTS FOR UNDERGROUND EXCAVATIONS
摘要
申请公布号	ZA7000822(B)	申请公布日期	1971.09.29
申请号	ZA19700000822	申请日期	1970.02.06
申请人	BOART DRILLING AND CONTRACTING LTD	发明人	HOPLEY R
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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