THE METHOD OF WORKING THE PARTS OF COAL BED WITH LIMITED REACH,申请号PL19860260665-传众专利搜索

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发明名称	THE METHOD OF WORKING THE PARTS OF COAL BED WITH LIMITED REACH
摘要
申请公布号	PL260665(A1)	申请公布日期	1988.03.17
申请号	PL19860260665	申请日期	1986.07.15
申请人		发明人
分类号	E21C;(IPC1-7):E21C/	主分类号	E21C
代理机构		代理人
主权项
地址

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