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发明名称
PROCESS OF QUARRYING A ROCK OR THE LIKE MATERIAL
摘要
申请公布号
CZ9300663(A3)
申请公布日期
1993.11.17
申请号
CS19910000663
申请日期
1991.10.16
申请人
BRUCE HOWARD D.
发明人
BRUCE HOWARD D.
分类号
E04G23/08;E21C;E21C37/06;(IPC1-7):E21C37/06
主分类号
E04G23/08
代理机构
代理人
主权项
地址
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