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经营范围
发明名称
DRILLING PIPE PROTECTOR
摘要
申请公布号
SU1687762(A1)
申请公布日期
1991.10.30
申请号
SU19894633423
申请日期
1989.01.09
申请人
KB POLT I IM.V.V.KUJBYSHEVA
发明人
NEJMARK ARKADIJ S,SU
分类号
E21B17/10
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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