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发明名称
A HOLDER FOR A PICK, AND THE COMBINATION OF A PICK AND HOLDER
摘要
申请公布号
EP0160757(B1)
申请公布日期
1988.05.04
申请号
EP19840303027
申请日期
1984.05.04
申请人
G-D M & C LIMITED
发明人
RADFORD, LEONARD
分类号
E21C35/18;E21C35/187;E21C35/197;(IPC1-7):E21C35/18;E21C35/22
主分类号
E21C35/18
代理机构
代理人
主权项
地址
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