In short, both straight and curved lines are supposed to exist.

At the top is a silver bar with a curved red line in the middle.

The curved classical line of his arms is a special pleasure.

At the top, a curved diagonal line going from right to left.

The desired approach path could be curved or straight line.

It held, she realized after a time, the only curved lines in the palace.

For the first time in my life, I saw the horizon as a curved line.

The second station is marked by a curved line which stands on a base.

They show up as curved lines on a photographic film.

Big curved green lines hung in the air above it.