A METHOD AND A DEVICE FOR A COMPRESSED AIR CONTROL IN ANOPERATING HOLE,IN A METHOD OF AN UNDERGROUND SULPHUR SMELTING,申请号PL19860261933-传众专利搜索

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发明名称	A METHOD AND A DEVICE FOR A COMPRESSED AIR CONTROL IN ANOPERATING HOLE,IN A METHOD OF AN UNDERGROUND SULPHUR SMELTING
摘要
申请公布号	PL261933(A1)	申请公布日期	1988.07.21
申请号	PL19860261933	申请日期	1986.10.17
申请人		发明人
分类号	E21B;E21B43/28;(IPC1-7):E21B/	主分类号	E21B
代理机构		代理人
主权项
地址

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