Việt
ngưỡng
Anh
knickpoint
change of grade
change of slope
knick point
Đức
Gefällsbruch
Gefällsknick
Neigungswechsel
Pháp
changement de pente
rupture de pente
change of grade,change of slope,knick point,knickpoint /SCIENCE/
[DE] Gefällsbruch; Gefällsknick; Neigungswechsel
[EN] change of grade; change of slope; knick point; knickpoint
[FR] changement de pente; rupture de pente