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经营范围
发明名称
Improvements in or relating to mine supports
摘要
申请公布号
GB846783(A)
申请公布日期
1960.08.31
申请号
GB19570038719
申请日期
1957.12.13
申请人
WILLY EGGEMANN;EBERHARD VON CAMPENHAUSEN
发明人
分类号
E21D15/44
主分类号
E21D15/44
代理机构
代理人
主权项
地址
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