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经营范围
发明名称
MINING EQUIPMENT
摘要
申请公布号
GB2049760(B)
申请公布日期
1983.04.27
申请号
GB19790018342
申请日期
1979.05.25
申请人
COAL INDUSTRY (PATENTS) LTD
发明人
分类号
E21C29/24;E21C35/22;(IPC1-7):E21C35/22
主分类号
E21C29/24
代理机构
代理人
主权项
地址
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