Cotoh text procdure how to flx a flat tire

1. Remove the tires from its wheels

2. Wash the removed tires with a water soap and then mop the tires

3. Slightly grind the surrounding leaked area.

4. Give the leaked area some glues 5. Close it with a rubber patch in the leaked area.

6. Put the rubbered tires to the electrical press machine and then press it, wait for 30 Minutes

7. Replace the repaired tires to their wheels.