SHIELD SELF-ADVANCING ROOF SUPPORTS,申请号PL19880270073-传众专利搜索

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发明名称	SHIELD SELF-ADVANCING ROOF SUPPORTS
摘要
申请公布号	PL156429(B1)	申请公布日期	1992.03.31
申请号	PL19880270073	申请日期	1988.01.08
申请人		发明人
分类号	E21D;E21D23/06;(IPC1-7):E21D23/06	主分类号	E21D
代理机构		代理人
主权项
地址

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