1. Chem. - Case and Canal 2. Chem. - Measure 3. Chem. - Other 4. Chem. - Periodic System of Elements 5. Electronic – Basic 6. Electronic – Switch and Connects 7. Electronic – Logic gate and Switch 8. Math – Algebra 9. Math – Geometry 10. Physics – Basic 11. Physics – Calorific 12. Physics – Electricity 13. Physics – Experiment 14. Physics – Mechanics 15. Physics – Optics 16. In common use Symbol 17. Phonetic Symbol 18.Picture Adjust

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