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发明名称
Cutting chains for mining machinery
摘要
申请公布号
US2822699(A)
申请公布日期
1958.02.11
申请号
US19560615811
申请日期
1956.10.15
申请人
THE CINCINNATI MINE MACHINERY CO.
发明人
KREKELER CLAUDE B.
分类号
E21C25/28
主分类号
E21C25/28
代理机构
代理人
主权项
地址
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