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| 11. | algebraic adder |
| 代数加法器 |
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| 12. | serial-type adder |
| 串联式加法器 |
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| 13. | righthand adder |
| 低位加法器 |
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| 14. | Kirchhoff adder |
| 基尔霍夫加法器 |
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| 15. | cathode-ray tube adder |
| 阴极射线管加法器 |
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| 16. | perforating adder |
| 穿孔加法器 |
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| 17. | frequency adder |
| 频率加法器 |
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| 18. | series type adder |
| 串联加法器 |
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| 19. | eight bit adder |
| 八位加法器 |
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| 20. | look ahead adder |
| 先行加法器 |
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