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发明名称
Method and an apparatus for installing underground pipes
摘要
申请公布号
US3415329(A)
申请公布日期
1968.12.10
申请号
US19670609190
申请日期
1967.01.13
申请人
AB VAVRA HYDRAULTEKNIK
发明人
MARLIND GORAN
分类号
E21B7/04;E21B7/06;E21B7/08
主分类号
E21B7/04
代理机构
代理人
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