Looper lines or also known as "roping" in aluminum is a form of "surface roughening" which occurs during deep drawing or drawing and ironing operations. The origin of looper lines occur during ingot casting, homogenization and rolling practices. The coarse grain structure are formed during the hot rolling or intermediate annealing when drawn into fine "fiber" like structure during temper rolling. In annealed sheets, if these fibers fail to recrystalize, the fibers can produce looper lines. Looper lines also can form because of segregated constituent or solute. If the coarse grains with segregation persist the reheating, this can produce looper lines.
Infinite lines can be drawn from a point
They are drawn on the earth as imaginary lines that run from east to west.
they are drawn from east to west
Usually state lines are drawn as a dot dash dot line.
A square by definition has lines of symmetry. Therefore a square cannot be drawn without any lines of symmetry.
uncountable lines can be drawn through one point.
Lines of Latitude
5 lines is symmetry
They are perpendicular lines
Meridians are lines of longitude that are drawn from the North to South poles.