POST FOR PROPPING THE CEILING OF THE DEEP COAL SEAM,申请号CS19720008013-传众专利搜索

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发明名称	POST FOR PROPPING THE CEILING OF THE DEEP COAL SEAM
摘要
申请公布号	CS186768(B2)	申请公布日期	1978.12.29
申请号	CS19720008013	申请日期	1972.11.24
申请人	GIBBINS,ROBERT A.,GB	发明人	GIBBINS,ROBERT A.,GB
分类号	E21D15/44;(IPC1-7):E21D15/44	主分类号	E21D15/44
代理机构		代理人
主权项
地址

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