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经营范围
发明名称
MINERAL-MINING CUTTER DRUM
摘要
申请公布号
GB2050469(B)
申请公布日期
1982.11.10
申请号
GB19800011502
申请日期
1980.04.08
申请人
RICH SERVICES INC ROY
发明人
分类号
E21C35/187;(IPC1-7):E21C35/22
主分类号
E21C35/187
代理机构
代理人
主权项
地址
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