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发明名称
ROCK DRILL SUPPORT
摘要
申请公布号
CA1031765(A)
申请公布日期
1978.05.23
申请号
CA19760259172
申请日期
1976.08.16
申请人
STEEL ENGINEERING COMPANY LIMITED
发明人
SEAWRIGHT, ROBERT M.F.
分类号
E21B;E21C
主分类号
E21B
代理机构
代理人
主权项
地址
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