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经营范围
发明名称
Casing centralizer
摘要
申请公布号
US2562083(A)
申请公布日期
1951.07.24
申请号
US19480052303
申请日期
1948.10.01
申请人
BAKER OIL TOOLS, INC.
发明人
JR. EARNEST H. CLARK,
分类号
E21B17/10
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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