Warning device for roof falls,申请号AT19900000821-传众专利搜索

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发明名称	Warning device for roof falls
摘要
申请公布号	AT393872(B)	申请公布日期	1991.12.27
申请号	AT19900000821	申请日期	1990.04.06
申请人	HABENICHT HELMUT	发明人
分类号	E21F17/18	主分类号	E21F17/18
代理机构		代理人
主权项
地址

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