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| frost line (The frost line–also known as frost depth or freezing depth–is most commonly the depth to which the groundwater in soil is expected to freeze. The frost depth depends on the climatic conditions of an area, the heat transfer properties of the soil and adjacent materials, and on nearby heat sources. WK Alexander Demidov) | |||
| depth of ground freezing | |||
| soil frost zone (proff2199); depth of frost penetration; frost depth (Ma_russie) | |||
| depth of soil freezing | |||
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