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发明名称
Bailer
摘要
申请公布号
US2118458(A)
申请公布日期
1938.05.24
申请号
US19350037404
申请日期
1935.08.22
申请人
PAUL CAVINS
发明人
CAVINS PAUL
分类号
E21B27/00
主分类号
E21B27/00
代理机构
代理人
主权项
地址
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