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发明名称
Mining machine head
摘要
申请公布号
US3388949(A)
申请公布日期
1968.06.18
申请号
US19650515670
申请日期
1965.12.22
申请人
THE SALEM TOOL COMPANY
发明人
KOZAR JOSEPH L.
分类号
E21C25/10;E21C25/58
主分类号
E21C25/10
代理机构
代理人
主权项
地址
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