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发明名称
Brake
摘要
申请公布号
US2291816(A)
申请公布日期
1942.08.04
申请号
US19410401246
申请日期
1941.07.05
申请人
THE CLEVELAND ROCK DRILL COMPANY
发明人
LEAR EARL B.
分类号
B66D5/00
主分类号
B66D5/00
代理机构
代理人
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