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发明名称
FOOT PIECE FOR LONGWALL ROOF SUPPORT WITH POSITION CORRECTOR
摘要
申请公布号
PL133564(B1)
申请公布日期
1985.06.29
申请号
PL19810232047
申请日期
1981.07.03
申请人
发明人
分类号
E21D;E21D23/06;(IPC1-7):E21D23/06
主分类号
E21D
代理机构
代理人
主权项
地址
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