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发明名称
ARRANGEMENT FOR DUST CONTROL IN DIBRODISCHARGE OF ORE
摘要
申请公布号
SU1536016(A1)
申请公布日期
1990.01.15
申请号
SU19874313308
申请日期
1987.08.14
申请人
VNII BEZOPASNOSTI TRUDA V GOR
发明人
USHAKOV PAVEL P,SU;SHISHKOV BORIS I,SU
分类号
E21B21/18;E21F5/00
主分类号
E21B21/18
代理机构
代理人
主权项
地址
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