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发明名称
Linear impact ripper apparatus
摘要
申请公布号
AU641378(B2)
申请公布日期
1993.09.23
申请号
AU19900050250
申请日期
1990.01.19
申请人
CATERPILLAR INC.
发明人
BRIAN D. JENSEN
分类号
E21B1/38;B25D17/24;B25D17/28;E02F5/32;E21B1/00;E21B1/26;E21C37/24;(IPC1-7):E21C3/04;E02F3/627
主分类号
E21B1/38
代理机构
代理人
主权项
地址
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