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发明名称
MOUTH HEAD
摘要
申请公布号
SU1571215(A1)
申请公布日期
1990.06.15
申请号
SU19874296858
申请日期
1987.08.12
申请人
SEVERO-KAVKAZSKIJ GNI PI NEFTYANOJ PROMYSHLENNOSTI
发明人
VARLAMOV PETR S,SU;PROTASOV VLADIMIR N,SU;DOLOVA EVGENIYA G,SU
分类号
E21B33/03
主分类号
E21B33/03
代理机构
代理人
主权项
地址
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