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发明名称
APPARATUS FOR DRILLING HOLES IN INTERSTOREY FLOORS
摘要
申请公布号
PL287892(A1)
申请公布日期
1992.06.01
申请号
PL19900287892
申请日期
1990.11.21
申请人
GLOWNY INSTYTUT GORNICTWA
发明人
BILINSKI ALFRED;GRIM ARKADIUSZ;JUNIEWICZ STANISLAW;NIEROBISZ ANDRZEJ;SKALSKI ZYGMUNT
分类号
E21B7/00;E21B7/02;E21D20/02;(IPC1-7):E21B7/00
主分类号
E21B7/00
代理机构
代理人
主权项
地址
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