BOOSTERING DEVICE TO PROVIDE ASSISTED OPERATION OF HEADING MACHINE ON SLOPES,申请号PL19830243927-传众专利搜索

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发明名称	BOOSTERING DEVICE TO PROVIDE ASSISTED OPERATION OF HEADING MACHINE ON SLOPES
摘要
申请公布号	PL140019(B1)	申请公布日期	1987.03.31
申请号	PL19830243927	申请日期	1983.09.28
申请人		发明人
分类号	E21C29/02;E21D;E21D9/10;(IPC1-7):E21C29/02	主分类号	E21C29/02
代理机构		代理人
主权项
地址

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