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发明名称
MANUFACTURING ROCK DRILL STEELS
摘要
申请公布号
CA528011(A)
申请公布日期
1956.07.17
申请号
CAD528011
申请日期
申请人
SANDCO LIMITED
发明人
DIDRIK W. HAGLUND
分类号
主分类号
代理机构
代理人
主权项
地址
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