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经营范围
发明名称
Cementing head
摘要
申请公布号
US3076509(A)
申请公布日期
1963.02.05
申请号
US19580737671
申请日期
1958.05.26
申请人
ERWIN BURNS;FIEL PETER J
发明人
BURNS ERWIN;FIEL PETER J.
分类号
E21B33/05
主分类号
E21B33/05
代理机构
代理人
主权项
地址
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