略語大辞典 [Geo] 25 TCO translocation crossover (地層の)転位クロスオーバー.translocation crossover; in soil; separating the upper and lower soil systems; where mass accumulation by invasive downward translocation ceases or even becomes negative for certain elements in the soil; [Geo]. 丸善「略語大辞典」JLogosID : 11851541