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经营范围
发明名称
A rock bolt rotating device
摘要
申请公布号
GB2128228(A)
申请公布日期
1984.04.26
申请号
GB19830026045
申请日期
1983.09.29
申请人
OY * TAMPELLA AB
发明人
JARMO * LEPPANEN
分类号
E21D20/00;(IPC1-7):E21D20/00
主分类号
E21D20/00
代理机构
代理人
主权项
地址
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