HYDRAULIC BORING APPARATUS,申请号PL19800225236-传众专利搜索

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发明名称	HYDRAULIC BORING APPARATUS
摘要
申请公布号	PL124043(B1)	申请公布日期	1982.12.31
申请号	PL19800225236	申请日期	1980.06.26
申请人		发明人
分类号	E21B3/00;B25D9/12;E21B1/00;E21B1/26;E21B6/00;E21B6/04;E21B44/02;(IPC1-7):E21C1/12	主分类号	E21B3/00
代理机构		代理人
主权项
地址

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