Table mirror: The watch's mirror can be basically divided into synthetic crystal glue, mineral glass and sapphire crystal glass. Synthetic water
Crystal rubber wear resistance is slightly poor and easy to scratch, but impact resistance is stronger; sapphire crystal glass wear degree, but the material is more fragile
Violent impacts; mineral-specific glass in between. Even anti-abrasive sapphire crystal glass should pay attention to diamonds,
Grinding stone, sandpaper, nail file, flower net surface, concrete wall surface, etc., in order to avoid scratching the surface.
2, on the watch waterproof