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经营范围
发明名称
Mining machine
摘要
申请公布号
US2363969(A)
申请公布日期
1944.11.28
申请号
US19440520510
申请日期
1944.01.31
申请人
B. I. BARNES
发明人
JONES TAZE W.
分类号
E21C27/26
主分类号
E21C27/26
代理机构
代理人
主权项
地址
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