Biblioteca
Estuda os sinais, revê a matéria e consulta resumos quando precisares.
#73bd67c8
This sign indicates:
Question under review
This question hasn't been validated yet, so it doesn't appear in exams and the correct answer isn't shown for now.
AExact location of a guarded level crossing.
BApproach to a guarded level crossing.
CApproach to an unguarded level crossing.