- 2022-04-06key repair
- 2022-04-06Change the strings
- 2022-04-06Set the hammer straight
- 2022-04-06Linkage adjustment
- 2022-04-06Adjust the microphone
- 2022-04-06Pedal repair
- 2022-04-06Touch Feeling adjustment
- 2022-04-06Piano noises
- 2022-04-06Change the chord axis
- 2022-04-06Regulator adjustment
