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经营范围
发明名称
Manufacture of bits for mining drills
摘要
申请公布号
US2626533(A)
申请公布日期
1953.01.27
申请号
US19490120998
申请日期
1949.10.12
申请人
CENTRAL MINE EQUIPMENT COMPANY
发明人
HUCKSHOLD ELMER J.
分类号
A01B35/10;B21K5/06;E21B10/44
主分类号
A01B35/10
代理机构
代理人
主权项
地址
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