perched ground water  悬着地下水; 滞水; 栖止地下水

aged frozen ground  多年冻土

artificially frozen ground  人工冻土; 管理信息库

eternal frozen ground  永冻土; 永冻地

Ever Frozen Ground  多年冻土

Ever-Frozen Ground  多年冻土

FROZEN GROUND  冻土病害; 冻结地层; 冻土; 冻地; 多年冻土; 冻原; 冻结地; 冻结融化; 地面冻结; 冻土层

Frozen ground and pile-support  排桩冻结法

Frozen ground blasting  冻土爆破

Frozen ground depth  冻结深度

frozen ground for many years  多年冻土区

Frozen Ground Region  高原冻土

frozen ground types  冻土类型

frozen water chestnut  冻荸荠

frozen water content  冻结水分

frozen water oat  冻茭白

frozen-ground  冻土

Perennial Frozen Ground  多年冻土

perennially frozen ground  永冻地; 冰冻地; 长期冻土; 永久冻土; 多年冻土