Anh
bottleneck
constriction
constriction zone
constricted opening
Đức
Engnis
Engstelle
Pháp
goulet d'étranglement
resserrement
rétrécissement
étranglement
Engnis,Engstelle /SCIENCE/
[DE] Engnis; Engstelle
[EN] bottleneck; constriction; constriction zone, constricted opening
[FR] goulet d' étranglement; resserrement; rétrécissement; étranglement