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发明名称
Suspension for pipe tongs
摘要
申请公布号
US2454317(A)
申请公布日期
1948.11.23
申请号
US19430488495
申请日期
1943.05.26
申请人
BYRON JACKSON CO.
发明人
HAMBLY ALLEN E.
分类号
E21B19/16
主分类号
E21B19/16
代理机构
代理人
主权项
地址
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