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Track ballast
01
lastro de via, lastro ferroviário
the layer of crushed stones or gravel placed under and around railway tracks to keep them in place and provide drainage
Exemplos
The workers spread new track ballast along the railway line to make the tracks more stable.
Os trabalhadores espalharam novo lastro ao longo da linha férrea para tornar os trilhos mais estáveis.
Without track ballast, the train tracks would shift and become uneven over time.
Sem lastro de via, os trilhos do trem se deslocariam e ficariam irregulares com o tempo.
