MECHANIZED ROOF SUPPORT,申请号PL19820236551-传众专利搜索

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发明名称	MECHANIZED ROOF SUPPORT
摘要
申请公布号	PL129955(B2)	申请公布日期	1984.06.30
申请号	PL19820236551	申请日期	1982.05.21
申请人		发明人
分类号	E21D;E21D23/00;(IPC1-7):E21D23/00	主分类号	E21D
代理机构		代理人
主权项
地址

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