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发明名称
(B1) ;HYDRAULIC BORING APPARATUS
摘要
申请公布号
PL225236(A1)
申请公布日期
1981.05.22
申请号
PL19800225236
申请日期
1980.06.26
申请人
TAMPELLA OY AB
发明人
分类号
E21B3/00;B25D9/12;E21B1/00;E21B1/26;E21B6/00;E21B6/04;E21B44/02;(IPC1-7):E21C/
主分类号
E21B3/00
代理机构
代理人
主权项
地址
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