文章拓展页 2（21）
Replacement of bellows- Pull-through plate
- Change Keys
- Riveting of parts
- Replace the spring
- Reed replacement
- Valve replacement
- side strap replacement
- Replacement of case buckle
- Replace the tray
- Change the shell wheel
- Bayse is falling apart
- Key retention
- Keyboard Lever Slot
- Guide slot
- Jaw Button
- Shell drive
- Free Bass system
- Package pasting
- The keys are blocked
- Sound spring riveting
