LONGWALL-TYPE ROOF-SUPPORT UNIT,申请号PL19860259076-传众专利搜索

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发明名称	LONGWALL-TYPE ROOF-SUPPORT UNIT
摘要
申请公布号	PL150612(B1)	申请公布日期	1990.06.30
申请号	PL19860259076	申请日期	1986.04.21
申请人		发明人
分类号	E21D23/04;(IPC1-7):E21D23/04	主分类号	E21D23/04
代理机构		代理人
主权项
地址

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