Improvements in valve chest for rock drills,申请号GB19290007854-传众专利搜索

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发明名称	Improvements in valve chest for rock drills
摘要
申请公布号	GB311813(A)	申请公布日期	1930.06.05
申请号	GB19290007854	申请日期	1929.03.11
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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