Device for controlling the passage of a flushing medium in impact machines,申请号US19900479714-传众专利搜索

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发明名称	Device for controlling the passage of a flushing medium in impact machines
摘要
申请公布号	US4991669(A)	申请公布日期	1991.02.12
申请号	US19900479714	申请日期	1990.02.14
申请人	ATLAS COPCO MCT AB	发明人	ANDERSSON, KURT H.
分类号	E21B4/02;E21B3/00;E21B6/02;E21B7/20;E21B17/00;E21B21/00;E21B21/10	主分类号	E21B4/02
代理机构		代理人
主权项
地址

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