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发明名称
DUST REMOVAL DEVICE FOR USE IN BLASTHOLE DRILLING
摘要
申请公布号
SU1008440(A2)
申请公布日期
1983.03.30
申请号
SU19813369125
申请日期
1981.11.20
申请人
TSNI PK I PROFILAKTIKI PNEVMOKONIOZOV TEKHNIKI BEZOPASNOSTI MINISTERSTVA TSVETNOJ METALLURGII SSSR
发明人
STEPANOV ANDREJ I,SU;STEPANOVA GALINA F,SU
分类号
E21B21/015;(IPC1-7):E21C7/00
主分类号
E21B21/015
代理机构
代理人
主权项
地址
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