シリアルトラックボールだったら
shiriarutorakkubōrudattara
1. If it were a serial trackball.; When it is a serial trackball.
Noun
1. If it were a serial trackball.; When it is a serial trackball.
1. if it's the case
1. (corrugated) cardboard
1. bowl
1. ball-point pen
1. fair
2. fair ball
3. fair (event)
1. volleyball
1. basketball
1. softball