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经营范围
发明名称
Packer mit ausstossbarem Verschlussstopfen fuer Tiefbohrungen
摘要
申请公布号
DE1126818(B)
申请公布日期
1962.04.05
申请号
DE1960B059263
申请日期
1960.09.07
申请人
BAKER OIL TOOLS, INC.
发明人
CROWE TALMADGE LAYNE
分类号
E21B33/12
主分类号
E21B33/12
代理机构
代理人
主权项
地址
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