多年冻土 meaning in Chinese

ever-frozen ground; permafrost; ever frost

Heat - bar construction technique on permafrost areas
多年冻土地区热棒施工技术
Plateau many year frozen earth area roadbed construction technology
高原多年冻土区路基的施工技术
Distribution and characteristic of permafrost of hei longjiang privince
黑龙江省多年冻土分布特征
Effect of temperature control on tunnel construction in permafrost
温度场控制在多年冻土隧道施工中的作用
Experiment research of drain technology of tunnel in forever frozen soil
多年冻土地区隧道排水技术试验研究

More: Next