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经营范围
发明名称
ROCK DRILLING APPARATUS
摘要
申请公布号
CA874846(A)
申请公布日期
1971.07.06
申请号
CAD874846
申请日期
申请人
WESTINGHOUSE AIR BRAKE COMPANY
发明人
ROBERT L. SANDVIG
分类号
主分类号
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