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发明名称
REAR ROOF BAR OF A MECHANIZED MINE ROOF SUPPORT
摘要
申请公布号
PL113091(B1)
申请公布日期
1980.11.29
申请号
PL19770203753
申请日期
1977.12.31
申请人
发明人
分类号
E21D;E21D17/01;E21D23/06;(IPC1-7):E21D17/01
主分类号
E21D
代理机构
代理人
主权项
地址
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