SHIELD-TYPE ROOF SUPPORTS,申请号PL19830243065-传众专利搜索

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发明名称	SHIELD-TYPE ROOF SUPPORTS
摘要
申请公布号	PL139781(B1)	申请公布日期	1987.02.28
申请号	PL19830243065	申请日期	1983.07.16
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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