APPARATUS FOR DISPLACING STEP-BY-STEP A MINING MACHINE ALONG A CUTTING FACE,申请号GB19680050884-传众专利搜索

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发明名称	APPARATUS FOR DISPLACING STEP-BY-STEP A MINING MACHINE ALONG A CUTTING FACE
摘要
申请公布号	GB1222229(A)	申请公布日期	1971.02.10
申请号	GB19680050884	申请日期	1968.10.25
申请人	CHARBONNAGES DE FRANCE	发明人
分类号	E21C29/02	主分类号	E21C29/02
代理机构		代理人
主权项
地址

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