gyeongjiljicheung
hardpan
couche dure (spécificité technique)
경질지층은 물이 잘 스며들지 않는 토양입니다.
gyeongjiljichungeun muri jal seumyeodeulji anheun toyangimnida.
Hardpan is a type of soil that does not allow water to permeate well.
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