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发明名称
Horizontal earth boring machine
摘要
申请公布号
US3132701(A)
申请公布日期
1964.05.12
申请号
US19610127656
申请日期
1961.07.28
申请人
JUNTUNEN ERNEST W
发明人
JUNTUNEN ERNEST W.
分类号
E21B7/04;E21B7/20;E21B19/08
主分类号
E21B7/04
代理机构
代理人
主权项
地址
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