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发明名称
Improvements in distributing valve for rock drills
摘要
申请公布号
GB380523(A)
申请公布日期
1932.09.22
申请号
GB19310018007
申请日期
1931.06.22
申请人
WILLIAM WARREN TRIGGS
发明人
分类号
B25D9/18
主分类号
B25D9/18
代理机构
代理人
主权项
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