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经营范围
发明名称
MINE ROOF SUPPORT
摘要
申请公布号
US3425229(A)
申请公布日期
1969.02.04
申请号
USD3425229
申请日期
1963.11.12
申请人
KARL MARIA GROETSCHEL
发明人
KARL MARIA GROETSCHEL
分类号
E21D23/00;(IPC1-7):E21D11/00
主分类号
E21D23/00
代理机构
代理人
主权项
地址
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