REAR ROOF BAR FOR MECHANIZED MINE ROOF SUPPORT UNITS,申请号PL19770201354-传众专利搜索

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发明名称	REAR ROOF BAR FOR MECHANIZED MINE ROOF SUPPORT UNITS
摘要
申请公布号	PL112272(B1)	申请公布日期	1980.10.31
申请号	PL19770201354	申请日期	1977.10.05
申请人		发明人
分类号	E21D;E21D17/01;E21D23/06;(IPC1-7):E21D17/01	主分类号	E21D
代理机构		代理人
主权项
地址

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