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经营范围
发明名称
Valve for rock drills
摘要
申请公布号
US1889423(A)
申请公布日期
1932.11.29
申请号
US19310542514
申请日期
1931.06.06
申请人
INGERSOLL-RAND COMPANY
发明人
SR. 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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