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发明名称
Liner
摘要
申请公布号
US2143072(A)
申请公布日期
1939.01.10
申请号
US19360114992
申请日期
1936.12.09
申请人
BAASH-ROSS TOOL COMPANY
发明人
JOHNSON GLENN D.
分类号
E21B43/08
主分类号
E21B43/08
代理机构
代理人
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