Anh
triangulation signal
trigonometrical beacon
Đức
Hochbau
Signal
Signalbau
trigonometrisches Signal
Pháp
signal trigonométrique
triangulation signal,trigonometrical beacon /SCIENCE/
[DE] Hochbau; Signal; Signalbau; trigonometrisches Signal
[EN] triangulation signal; trigonometrical beacon
[FR] signal trigonométrique