งานนำเสนอ1 [recovered]

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  • 1. . . . 56000 . . 7 . 3/3 . . 11 .3/3 . . 12 . 3/3 . . 16 . 3/3 . . 18 . 3/3

2. 1. 2. 3. 4. 3. 4. 1 . 2 . 2 ( ) ( ) 3 . 5. 6. 2 1 . 2 . 3 . 2 100 7. 8. ( Amplifier ) 1 . 2 . 3 . 9. (Tape recorder) 10. 11. 12.

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