COAL MINING METHOD AT A LONG WALL PIT FACE OF A COAL MINE,申请号ZA19790004081-传众专利搜索

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发明名称	COAL MINING METHOD AT A LONG WALL PIT FACE OF A COAL MINE
摘要
申请公布号	ZA7904081(B)	申请公布日期	1980.08.27
申请号	ZA19790004081	申请日期	1979.08.07
申请人	TAIHEIYO ENG INC	发明人	NAKAJIMA S;ENDO H
分类号	E21C	主分类号	E21C
代理机构		代理人
主权项
地址

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