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发明名称
SHAFT DRILLING MACHINE
摘要
申请公布号
AU516990(B2)
申请公布日期
1981.07.02
申请号
AU19780036393
申请日期
1978.05.23
申请人
WESLEY B. CUNNINGHAM
发明人
W.B. CUNNINGHAM
分类号
E21B4/00;E21B4/04;E21B4/18;E21B7/02;E21B10/08;E21B10/18;E21B21/12;E21D1/06;(IPC1-7):E21D1/06
主分类号
E21B4/00
代理机构
代理人
主权项
地址
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