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发明名称
DEVICE FOR PRESETTING DIRECTION IN BLASTHOLE DRILLING
摘要
申请公布号
SU1474250(A1)
申请公布日期
1989.04.23
申请号
SU19864167754
申请日期
1986.12.25
申请人
GUMENNIKOV EVGENIJ S,SU;SASSA ANATOLIJ S,SU;FECH VENIAMIN M,SU;VINOGRADOV VALERIJ L,SU
发明人
GUMENNIKOV EVGENIJ S,SU;SASSA ANATOLIJ S,SU;FECH VENIAMIN M,SU;VINOGRADOV VALERIJ L,SU
分类号
E21B19/24;E21B7/04;E21C37/00;E21D9/10;F42D3/04
主分类号
E21B19/24
代理机构
代理人
主权项
地址
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