FRONT SHIELD OF MINE ROOF SUPPORT,申请号PL19800224240-传众专利搜索

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发明名称	FRONT SHIELD OF MINE ROOF SUPPORT
摘要
申请公布号	PL126381(B1)	申请公布日期	1983.07.30
申请号	PL19800224240	申请日期	1980.05.13
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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