回複：回複：（！）外麵是圓弧 還是三角形？可能是胎壓，刹車要看什麽形狀

You can check your user manual that comes with your car. There should be description on what the signs mean.

Your tire pressure might be too low (IIRC the standard pressure is 35psi). You can check which tire is losing pressure. It might be a different tire than the ones that were fixed.