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发明名称
ARRANGEMENT FOR GUIDING A ROCK DRILL
摘要
申请公布号
US3590930(A)
申请公布日期
1971.07.06
申请号
USD3590930
申请日期
1968.12.04
申请人
TEUVO TAPIO GRONFORS
发明人
TEUVO TAPIO GRONFORS
分类号
E21B15/04;(IPC1-7):E21C9/00
主分类号
E21B15/04
代理机构
代理人
主权项
地址
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