How to draw radian landmarks?

China patent cn 105855 120b discloses an arc plate coating device for buildings.

The device comprises a left frame, a bottom plate and the like. A left frame is arranged at the left end of the bottom plate, and an electric wheel is arranged at the upper part of the right side of the left frame, and a pull wire is wound on the electric wheel. A slide rail, a rotating motor and a thumb cylinder are sequentially arranged at the top of the bottom plate from left to right, and a slider I and a slider I are sequentially connected in a sliding manner on the slide rail from left to right. However, when in use, the arc-shaped plate is fixed by the thumb tube, so it is difficult to locate the arc-shaped plate when it is installed and fixed, and it is easy to shake when it contacts with A, which leads to unsatisfactory painting quality, and the brush can not always contact with the surface of the arc-shaped plate when painting, resulting in uneven surface of the arc-shaped plate. When the brush is dipped in paint, the paint will fly around because of inertia, and the paint will be in an inward static state for a long time, which is not conducive to the quality of paint.

The landmark paint is epoxy resin. When it is applied to the ground, it begins to cure by adding a hardener. This process can't be wet or wet, otherwise the curing is not complete. There will be bubbles and streaks, and the strength is not good. It is best not to construct in rainy days. Construction is usually carried out before four o'clock in the afternoon in winter. The construction of epoxy traffic paint is greatly influenced by the weather. Temperature and humidity are important factors affecting the quality of landmark buildings. For example, if the problem is too high or too low, the material will not fully react, and if the humidity is too high, the landmark will bubble and deform.