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发明名称
SWIVEL
摘要
申请公布号
SU1698417(A1)
申请公布日期
1991.12.15
申请号
SU19894673459
申请日期
1989.04.04
申请人
G TREST PO OSUSHENIYU SHAKHT RAZREZOV "SOYUZSHAKHTOOSUSHENIE"
发明人
SONIN VALENTIN S,SU;ISMAGILOV IRIK A,SU;YAROKHOVICH IVAN S,SU;TANAEV SERGEJ M,SU
分类号
E21B21/02
主分类号
E21B21/02
代理机构
代理人
主权项
地址
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