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发明名称
Pin tap
摘要
申请公布号
US2263758(A)
申请公布日期
1941.11.25
申请号
US19400344351
申请日期
1940.07.08
申请人
BAASH-ROSS TOOL COMPANY
发明人
BROWN ORA A.
分类号
E21B31/107;E21B31/20
主分类号
E21B31/107
代理机构
代理人
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