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发明名称
ROTARY CUTTER FOR MINING ROCKY MATERIALS
摘要
申请公布号
PL261007(A1)
申请公布日期
1988.05.26
申请号
PL19860261007
申请日期
1986.08.11
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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