Việt
đường đo thuỷ chuẩn
Anh
line of levels
level line
line of levelling
Đức
Gradientenzug
Nivellementlinie
Pháp
ligne de nivellement
level line,line of levelling,line of levels /SCIENCE/
[DE] Nivellementlinie
[EN] level line; line of levelling; line of levels
[FR] ligne de nivellement
Gradientenzug /m/XD/
[EN] line of levels
[VI] đường đo thuỷ chuẩn