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× 4. The Weight Engineer and the Flutter Problem 4. The Weight Engineer and the Flutter Problem $20.00
$20.00
× 13. Will Accessories Impede Our Payload? 13. Will Accessories Impede Our Payload? $20.00
$20.00
× 23. The Value of a Pound 23. The Value of a Pound $20.00
$20.00
× 7. Predetermination of Weight Efficiency 7. Predetermination of Weight Efficiency $20.00
$20.00

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Subtotal $80.00
Tax $0.00
Total $80.00
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