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发明名称
METHOD OF CONSTRUCTING CANALS IN DEEP-FREEZING SOIL ZONES
摘要
申请公布号
SU1298309(A1)
申请公布日期
1987.03.23
申请号
SU19853867428
申请日期
1985.03.18
申请人
IVANOV IGOR A,SU
发明人
IVANOV IGOR A,SU
分类号
E02F1/00
主分类号
E02F1/00
代理机构
代理人
主权项
地址
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