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经营范围
发明名称
ROCK WINNING TOOL
摘要
申请公布号
PL267982(A1)
申请公布日期
1989.04.03
申请号
PL19870267982
申请日期
1987.09.28
申请人
发明人
分类号
E21C;(IPC1-7):E21C/
主分类号
E21C
代理机构
代理人
主权项
地址
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