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发明名称
MINE-FACE CATCHER
摘要
申请公布号
SU565985(A1)
申请公布日期
1977.07.25
申请号
SU19742080596
申请日期
1974.12.02
申请人
VNII BUROVOJ TEKHNIKI (VNIIBT)
发明人
AKOPOV EDUARD A,SU
分类号
E21B27/00;E21B31/00;(IPC1-7):E21B31/00
主分类号
E21B27/00
代理机构
代理人
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