水下[下水]滑道  under water launching way

残余永冻土  relict permafrost

干性永冻土  dry permafrost

永冻的  ever-frozen

永冻土  permafrost; eternal frozen ground; pergelisol; neve frozen soil; perennial frost

永冻土层面  permafrost table

永冻土带  permafrost

永冻土泥流  congelifluction

永冻土上的  supragelisol

永冻土上覆层  supragelisol

永久冻土下位水  subpermafrost water

冰冻的冻结的严寒的  Frozen

冻土冻胀试验  Frozen soil frost heave experiment

冻土水文  Hydrology in the permafrost and seasonal frozen regions; frozen soil hydrology

冻土水盐  water and salt of frozen earth

地面下的土壤  Undersoil

地下水水稻土  ground water paddy soil

地下水土  soil and groundwater

地下水土流失机理  mechanism of soil and water loss underground