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经营范围
发明名称
Well packers
摘要
申请公布号
US3011555(A)
申请公布日期
1961.12.05
申请号
US19580728147
申请日期
1958.04.14
申请人
BAKER OIL TOOLS, INC.
发明人
JR. EARNEST H. CLARK,
分类号
E21B23/06;E21B33/1295
主分类号
E21B23/06
代理机构
代理人
主权项
地址
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