METHOD OF CONDUCTING EXPLOITATION WORKS IN THE UNDERGROUND SULPHUR SMELTING PROCESSNOJJ VYPLAVKI SERY,申请号PL19800224569-传众专利搜索

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发明名称	METHOD OF CONDUCTING EXPLOITATION WORKS IN THE UNDERGROUND SULPHUR SMELTING PROCESSNOJJ VYPLAVKI SERY
摘要
申请公布号	PL120961(B2)	申请公布日期	1982.04.30
申请号	PL19800224569	申请日期	1980.05.27
申请人		发明人
分类号	E21B;E21B43/28;(IPC1-7):E21B43/28	主分类号	E21B
代理机构		代理人
主权项
地址

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