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发明名称
ROCK DRILL BITS
摘要
申请公布号
CA689633(A)
申请公布日期
1964.06.30
申请号
CAD689633
申请日期
申请人
HARD METALS LIMITED
发明人
HELMUTH H. SCHLOSSIN
分类号
主分类号
代理机构
代理人
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地址
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