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发明名称
Devices for suspension and anchoring of oil well columns, with metal-metal seals
摘要
申请公布号
IT1265934(B1)
申请公布日期
1996.12.16
申请号
IT1993PC00016
申请日期
1993.09.27
申请人
MAESTRAMI MARINO
发明人
MAESTRAMI MARINO
分类号
E21B
主分类号
E21B
代理机构
代理人
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地址
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