to maintain a smooth contact between line & train
5 railways
On successful railways it has been found that parallel works the best.
They are painted onto the floor. Then the floor is covered with ice. Because the lines are under the ice, instead of part of the ice, resurfacing the ice won't remove the lines.
No, a T-Rex cannot be painted because they are extinct dinosaurs and do not exist in the present day to be painted.
creases
On successful railways it has been found that parallel works the best.
Yes, tape that can be painted over can be used to create clean and precise lines in a painting project.
No. The word "painted" is a verb form, or an adjective. It can form a participial phrase, but it cannot be a preposition.
black
Skew lines cannot lie in the same plane.
Thick black lines on maps typically represent major roads, highways, or railways. They are used to denote routes that are important for transportation and travel.
Painted on the floor and the ice is put on after.