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发明名称
WATER DRAINAGE DITCH IN PERMAFROST SOIL
摘要
申请公布号
SU1379398(A1)
申请公布日期
1988.03.07
申请号
SU19864142680
申请日期
1986.09.09
申请人
KHABAROVSKIJ I INZHENEROV ZHELEZNODOROZHNOGO TRANSPORTA
发明人
TASHLYKOV PETR G,SU
分类号
E01F5/00
主分类号
E01F5/00
代理机构
代理人
主权项
地址
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