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发明名称
DUST COLLECTOR OF CRAWLER DRILL
摘要
申请公布号
KR960006711(Y1)
申请公布日期
1996.08.05
申请号
KR19930009010U
申请日期
1993.05.26
申请人
CHOE, YUN - YUL
发明人
CHOE, YUN - YUL
分类号
E21B7/02;(IPC1-7):E21B7/02
主分类号
E21B7/02
代理机构
代理人
主权项
地址
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