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发明名称
GASSLOEFTNINGS-SYSTEMER.
摘要
申请公布号
NO882107(D0)
申请公布日期
1988.05.13
申请号
NO19880002107
申请日期
1988.05.13
申请人
BECHTEL LTD
发明人
SHOTBOLT, KEITH
分类号
E21B43/12;F04F1/18;(IPC1-7):E21B43/00
主分类号
E21B43/12
代理机构
代理人
主权项
地址
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