Anh
test substance
tracer
Đức
Testsubstanz
Indikator
Pháp
substance d'essai
messager
traceur
Testsubstanz /SCIENCE/
[DE] Testsubstanz
[EN] test substance
[FR] substance d' essai
Indikator,Testsubstanz /INDUSTRY,INDUSTRY-METAL/
[DE] Indikator; Testsubstanz
[EN] tracer
[FR] messager; traceur