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发明名称
Process for the construction of a large diameter well which is substantially circular in plan with a base slab and means for the purpose
摘要
申请公布号
IT1268029(B1)
申请公布日期
1997.02.20
申请号
IT1994TO00142
申请日期
1994.03.02
申请人
TREVI S.P.A.
发明人
TREVISANI DAVIDE
分类号
E21D
主分类号
E21D
代理机构
代理人
主权项
地址
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