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经营范围
发明名称
OPEN CAST MINING METHOD
摘要
申请公布号
AU632959(B2)
申请公布日期
1993.01.14
申请号
AU19910082662
申请日期
1991.08.23
申请人
MAN GUTEHOFFNUNGSHUTTE AKTIENGESELLSCHAFT
发明人
DIPL.-ING. HARTMUT GRATHOFF
分类号
E21C41/26;E21C41/28;E21C41/30
主分类号
E21C41/26
代理机构
代理人
主权项
地址
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