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经营范围
发明名称
Method of Suppressing Crumps in Rock Surrounding a Mineral Bed Being Worked in a Mine
摘要
申请公布号
GB1181258(A)
申请公布日期
1970.02.11
申请号
GB19670022356
申请日期
1967.05.15
申请人
GLOWNY INSTYTUT GORNICTWA, KATCWICE
发明人
分类号
E21C41/00
主分类号
E21C41/00
代理机构
代理人
主权项
地址
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