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经营范围
发明名称
ROCK-BREAKING METHOD
摘要
申请公布号
SU933927(A1)
申请公布日期
1982.06.07
申请号
SU19803001312
申请日期
1980.11.05
申请人
AFANASEV VLADIMIR V
发明人
AFANASEV VLADIMIR V,SU
分类号
E21B7/18;(IPC1-7):E21B7/18
主分类号
E21B7/18
代理机构
代理人
主权项
地址
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