LEMNISCATE-TYPE SHIELDED ROOF SUPPORT,申请号PL19820236052-传众专利搜索

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发明名称	LEMNISCATE-TYPE SHIELDED ROOF SUPPORT
摘要
申请公布号	PL136909(B1)	申请公布日期	1986.04.30
申请号	PL19820236052	申请日期	1982.04.19
申请人		发明人
分类号	E21D;E21D23/04;(IPC1-7):E21D23/04	主分类号	E21D
代理机构		代理人
主权项
地址

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