CONNECTION OF DRILL TUBES,申请号ZA19820006921-传众专利搜索

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发明名称	CONNECTION OF DRILL TUBES
摘要
申请公布号	ZA8206921(B)	申请公布日期	1983.12.28
申请号	ZA19820006921	申请日期	1982.09.21
申请人	BOART INTERNATIONAL LTD	发明人	HOLMBERG JOHN MARTIN
分类号	E21B;F16L	主分类号	E21B
代理机构		代理人
主权项
地址

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