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发明名称
Slip assembly
摘要
申请公布号
US2874436(A)
申请公布日期
1959.02.24
申请号
US19550495575
申请日期
1955.03.21
申请人
CAMERON IRON WORKS, INC.
发明人
ALLEN HERBERT
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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