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发明名称
DUST-COLLECTING DEVICE TO DRILLING MACHINES
摘要
申请公布号
SU717316(A1)
申请公布日期
1980.02.25
申请号
SU19772554554
申请日期
1977.12.15
申请人
VNI PK UGOLNYJ INSTITUT
发明人
BELAN NIKOLAJ A,SU;SUKHORUKOV VLADIMIR A,SU;ZVYAGIN VIKTOR P,SU;AKULOV VIKTOR A,SU;GAVRILOV OLEG P,SU
分类号
E21B21/18;(IPC1-7):E21C7/00
主分类号
E21B21/18
代理机构
代理人
主权项
地址
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