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发明名称
WELLBORE CEMENT PLACEMENT TOOL
摘要
申请公布号
GB9203955(D0)
申请公布日期
1992.04.08
申请号
GB19920003955
申请日期
1992.02.25
申请人
HEAD, PHILIP F
发明人
分类号
主分类号
代理机构
代理人
主权项
地址
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