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发明名称
IMPROVEMENTS IN OR RELATING TO MINING EQUIPMENT
摘要
申请公布号
GB1201150(A)
申请公布日期
1970.08.05
申请号
GB19660056569
申请日期
1966.12.16
申请人
GULLICK DOBSON LIMITED, FORMERLY GULLICK LIMITED
发明人
FRED SMALL
分类号
E21C35/12;E21D23/04
主分类号
E21C35/12
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