Seawater bead

1. Shape grade: the perfect circle is A 1. (Diameter difference percentage is less than or equal to 1)

2. Gloss: A is extremely strong. Reflected light: especially bright, sharp and uniform, with a mirror-like surface and clear image.

3. Thickness of bead layer: the extra thickness is a .. < < Thickness of weld layer (mm) is greater than or equal to 0.6 >: >;

4. smoothness: flawless is a. (pearl skin: the surface is smooth and delicate, and it is extremely difficult for the naked eye to see that the surface is flawed)