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发明名称
Jar
摘要
申请公布号
US1849879(A)
申请公布日期
1932.03.15
申请号
US19300434556
申请日期
1930.03.10
申请人
MCCULLOUGH IRA J
发明人
MCCULLOUGH IRA J.
分类号
E21B31/107
主分类号
E21B31/107
代理机构
代理人
主权项
地址
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