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经营范围
发明名称
WELL EXPANDER
摘要
申请公布号
SU1514899(A1)
申请公布日期
1989.10.15
申请号
SU19884359954
申请日期
1988.01.06
申请人
NI PK I PO PROBLEMAM RAZVITIYA KANSKO-ACHINSKOGO UGOLNOGO BASSEJNA
发明人
ZHELUKEVICH RYSHARD B,SU;KOVALCHUK VLADIMIR A,SU;BLAGODATSKAYA OLGA A,SU
分类号
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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