Input of energy - Energy entering a system, Percussion instrument - Played by hitting or shaking, Wind instrument - Played by blowing, Output of energy - Energy exiting a system, String instrument - Played by plucking strings,

Κατάταξη

Οπτικό στυλ

Επιλογές

Αλλαγή προτύπου

Επαναφορά αυτόματα αποθηκευμένου: ;