 |
| |||
| кельтский камень (A semi-ellipsoidal top which will spin on its axis in a preferred direction. But, if spun in the opposite direction, it becomes unstable, "rattles", stops and reverses its spin to the preferred direction slitely_mad) | |||
| "кельтский камень" | |||
|
rattleback : 1 a las frases, 1 temas |
| Mecánica | 1 |