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发明名称
Improvements in valve mechanism for rock drills
摘要
申请公布号
GB373748(A)
申请公布日期
1932.06.02
申请号
GB19310012744
申请日期
1931.04.30
申请人
INGERSOLL-RAND COMPANY
发明人
分类号
B25D9/24
主分类号
B25D9/24
代理机构
代理人
主权项
地址
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