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发明名称
EXPANDER
摘要
申请公布号
SU1234567(A1)
申请公布日期
1986.05.30
申请号
SU19843828890
申请日期
1984.12.19
申请人
VNI PK I GORNO-RUDNOGO MASHINOSTROENIYA
发明人
POLUDNENKO YURIJ Z,SU;MAKASHOV LEONID N,SU;VOYUTA LEONTIJ F,SU;TIKHONOV ANATOLIJ I,SU
分类号
E21B7/28;(IPC1-7):E21B7/28
主分类号
E21B7/28
代理机构
代理人
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地址
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