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发明名称
REVERSIBLE DEVICE FOR SINKING HOLES IN EARTH
摘要
申请公布号
SU1305272(A1)
申请公布日期
1987.04.23
申请号
SU19853851625
申请日期
1985.02.21
申请人
INST GORNOGO DELA SO AN SSSR
发明人
KOSTYLEV ALEKSANDR D,SU;PLAVSKIKH VLADIMIR D,SU;SKACHKOV KONSTANTIN B,SU;TERSKOV ALEKSEJ D,SU;REZNIKOV IGOR I,SU;TARASENKO VLADIMIR I,SU
分类号
E21B7/26;B25D9/26;E02F5/16;E02F5/18;E21B4/14
主分类号
E21B7/26
代理机构
代理人
主权项
地址
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