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发明名称
WORKING-FACE VALVE
摘要
申请公布号
SU575410(A1)
申请公布日期
1977.10.05
申请号
SU19742045170
申请日期
1974.06.11
申请人
SREDNEAZIATSKIJ NII PRIRODNOGO GAZA
发明人
ALIDZHANOV GANIDZHAN,SU;KUZNETSOV EDUARD B,SU;SHEVCHENKO ALEKSANDR K,SU
分类号
E21B43/00;(IPC1-7):E21B43/00
主分类号
E21B43/00
代理机构
代理人
主权项
地址
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