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发明名称
Slip assembly
摘要
申请公布号
US2153770(A)
申请公布日期
1939.04.11
申请号
US19360089842
申请日期
1936.07.09
申请人
WILSON SUPPLY COMPANY
发明人
NIXON JEDDY D.
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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