Việt
đường cột nước thê' năng
Anh
total head line
energy grade line
energy head line
energy line
Đức
Energielinie
Pháp
ligne d'énergie
ligne de charge
energy grade line,energy head line,energy line,total head line /SCIENCE/
[DE] Energielinie
[EN] energy grade line; energy head line; energy line; total head line
[FR] ligne d' énergie; ligne de charge