Rotary disintegrating drum for continuous miner,申请号US19540463706-传众专利搜索

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发明名称	Rotary disintegrating drum for continuous miner
摘要
申请公布号	US2801838(A)	申请公布日期	1957.08.06
申请号	US19540463706	申请日期	1954.10.21
申请人	JOY MANUFACTURING COMPANY	发明人	BRADLEY EARL A.
分类号	E21C25/10	主分类号	E21C25/10
代理机构		代理人
主权项
地址

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