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发明名称
Valve for rock drills
摘要
申请公布号
US1774572(A)
申请公布日期
1930.09.02
申请号
US19290408510
申请日期
1929.11.20
申请人
INGERSOLLRAND COMPANY
发明人
JR. WILLIAM A. SMITH,
分类号
B25D9/20
主分类号
B25D9/20
代理机构
代理人
主权项
地址
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