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发明名称
DRILL PIPE PROTECTOR
摘要
申请公布号
US3588199(A)
申请公布日期
1971.06.28
申请号
USD3588199
申请日期
1969.08.11
申请人
ARTHUR H. HOPMANS
发明人
ARTHUR H. HOPMANS
分类号
E21B17/10;(IPC1-7):F16C1/26
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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