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发明名称
SAFETY VALVES FOR WELLS
摘要
申请公布号
GB2131069(A)
申请公布日期
1984.06.13
申请号
GB19830031346
申请日期
1983.11.24
申请人
COMPAGNIE * FRANCAISE DES PETROLES
发明人
PAUL * HELDERLE
分类号
E21B23/02;E21B34/00;E21B34/10;(IPC1-7):E21B34/10
主分类号
E21B23/02
代理机构
代理人
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