(B1) ;LEAK STOPPER FOR BOREHOLES,申请号PL19800225906-传众专利搜索

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发明名称	(B1) ;LEAK STOPPER FOR BOREHOLES
摘要
申请公布号	PL225906(A1)	申请公布日期	1982.02.01
申请号	PL19800225906	申请日期	1980.07.25
申请人	PRZED POSZUKIWANIA NAFTY I GAZ	发明人	DRANKA HENRYK;MARSZALEK JAN
分类号	E21B;E21B33/03;(IPC1-7):E21B/	主分类号	E21B
代理机构		代理人
主权项
地址

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