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发明名称
METHOD OF PROTECTION OF MINE DOG HEADINGS AND TUNNELS
摘要
申请公布号
PL245257(A2)
申请公布日期
1984.10.22
申请号
PL19830245257
申请日期
1983.12.20
申请人
GLOWNY INSTYTUT GORNICTWA
发明人
BILINSKI ALFRED;DRZEWIECKI JAN;KABIESZ JOZEF;OZANA PAWEL;OSTRIHANSHY RUDOLF
分类号
E21D;E21D9/00;E21F17/00;(IPC1-7):E21D/
主分类号
E21D
代理机构
代理人
主权项
地址
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