Việt
tâm cong
Anh
center of curvature
centre of curvature
Đức
Krümmungszentrum
Krümmungszentrum /nt/V_LÝ, VLB_XẠ/
[EN] center of curvature (Mỹ), centre of curvature (Anh)
[VI] tâm cong