Roof support cap for mining prop means,申请号US19640377419-传众专利搜索

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发明名称	Roof support cap for mining prop means
摘要
申请公布号	US3237903(A)	申请公布日期	1966.03.01
申请号	US19640377419	申请日期	1964.06.23
申请人	GEWERKSCHAFT EISENHUTTE WESTFALIA	发明人	DOMMANN GUNTHER;HOFFMANN ERICH;HAVERS HERMANN
分类号	E21D17/10	主分类号	E21D17/10
代理机构		代理人
主权项
地址

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