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经营范围
发明名称
WELL CEMENTING HEAD APPARATUS
摘要
申请公布号
IE801540(L)
申请公布日期
1981.01.26
申请号
IE19800001540
申请日期
1980.07.24
申请人
THE DOW CHEMICAL CO
发明人
分类号
E21B33/05;(IPC1-7):E21B33/14
主分类号
E21B33/05
代理机构
代理人
主权项
地址
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