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发明名称
DEVICE FOR LOOSENENING FROZEN AND COMPACT SOIL
摘要
申请公布号
SU819282(A1)
申请公布日期
1981.04.07
申请号
SU19792708936
申请日期
1979.01.08
申请人
PERMSKIJ POLT INSTITUT
发明人
MATVEEV ALEKSANDR V,SU
分类号
E02F5/30;(IPC1-7):E02F5/30
主分类号
E02F5/30
代理机构
代理人
主权项
地址
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