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发明名称
Slip bushing
摘要
申请公布号
US1849102(A)
申请公布日期
1932.03.15
申请号
US19280292843
申请日期
1928.07.14
申请人
LIVERGOOD GERALD R
发明人
LIVERGOOD GERALD R.
分类号
E21B19/10
主分类号
E21B19/10
代理机构
代理人
主权项
地址
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