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发明名称
Improvements in and relating to apparatus for blasting minerals by the use of water and air under pressure
摘要
申请公布号
GB1033062(A)
申请公布日期
1966.06.15
申请号
GB19630003287
申请日期
1963.01.25
申请人
HEDWIG BEUKENBERG;HANS BEUKENBERG;KLAUS BEUKENBERG
发明人
分类号
E21C37/12
主分类号
E21C37/12
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