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发明名称
Gummer for mineral mining machines
摘要
申请公布号
GB858439(A)
申请公布日期
1961.01.11
申请号
GB19580030953
申请日期
1958.09.27
申请人
THE MINING ENGINEERING COMPANY LIMITED
发明人
PAUL THOMAS CAMPBELL
分类号
E21C35/20
主分类号
E21C35/20
代理机构
代理人
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地址
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