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经营范围
发明名称
Automatic scraper for use in deep wells
摘要
申请公布号
US3072194(A)
申请公布日期
1963.01.08
申请号
US19580770186
申请日期
1958.10.28
申请人
TEXACO INC.
发明人
WINDERS RAYMOND E.
分类号
E21B37/02
主分类号
E21B37/02
代理机构
代理人
主权项
地址
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