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经营范围
发明名称
ROCK DRILL
摘要
申请公布号
CA377003(A)
申请公布日期
1938.10.11
申请号
CAD377003
申请日期
申请人
HOLMAN BROTHERS LIMITED
发明人
PERCY MYNORS HOLMAN;BENJAMIN COCK;ARTHUR TREVE HOLMAN
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主分类号
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代理人
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