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经营范围
发明名称
Bohrkopf, insbesondere zum Bohren im Erdreich oder lockerem Gestein
摘要
申请公布号
CH518441(A)
申请公布日期
1972.01.31
申请号
CH19700010231
申请日期
1970.07.07
申请人
NYA ASFALT AB
发明人
HARALD HORNSTEN,KARL
分类号
E21B10/40;(IPC1-7):E21C13/06
主分类号
E21B10/40
代理机构
代理人
主权项
地址
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