METHOD OF PROTECTING ROOF AND AXIAL BREACHES IN LONGWALL HEADINGS,申请号PL19840249360-传众专利搜索

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发明名称	METHOD OF PROTECTING ROOF AND AXIAL BREACHES IN LONGWALL HEADINGS
摘要
申请公布号	PL249360(A2)	申请公布日期	1985.07.02
申请号	PL19840249360	申请日期	1984.08.27
申请人	GLOWNY INSTYTUT GORNICTWA	发明人	LOJAS JOZEF;MALARA LECH;MROWIEC ZENON;PEREK JAN;SAWKA BOHDAN;STRZEMINSKI JANUSZ;TWARDOKES KAZIMIERZ
分类号	E21D11/00;E21F;E21F15/00;(IPC1-7):E21F/	主分类号	E21D11/00
代理机构		代理人
主权项
地址

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