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发明名称
METHOD AND APPARATUS FOR FORMING DRAIN HOLES
摘要
申请公布号
SU1682547(A1)
申请公布日期
1991.10.07
申请号
SU19894749115
申请日期
1989.10.16
申请人
VNI PK I PO OSUSHENIYU MESTOROZHDENIJ POLEZNYKH ISKOPAEMYKH, CüE|ôAóÓHÕM ×OPHÕM PA¬OTAM, PÔ¯HôÚHOö ×EOóO×ôô ô MAPKÛEö¯EPCKOMÔ ¯EóÔ
发明人
BONDARENKO IVAN I,SU;KUZKIN VALERIJ S,SU;SAZONOV YURIJ A,SU
分类号
E21B7/00;E21B3/00
主分类号
E21B7/00
代理机构
代理人
主权项
地址
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