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发明名称
Mine Roof Support System
摘要
申请公布号
CA2092150(A1)
申请公布日期
1994.02.12
申请号
CA19932092150
申请日期
1993.03.22
申请人
DYCKERHOFF & WIDMANN AG
发明人
LONG, LAWRENCE E.;LANGENECKERT, KLAUS M.;HERRMANN, GERO
分类号
E21D15/00;E21D21/00;(IPC1-7):E21D15/00
主分类号
E21D15/00
代理机构
代理人
主权项
地址
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