DRIVE ASSEMBLY,申请号GB19840031906-传众专利搜索

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发明名称	DRIVE ASSEMBLY
摘要
申请公布号	GB8431906(D0)	申请公布日期	1985.01.30
申请号	GB19840031906	申请日期	1984.12.18
申请人	NATIONAL MINE SERVICE CO	发明人
分类号	E21C31/02	主分类号	E21C31/02
代理机构		代理人
主权项
地址

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