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| two input subtracter | |||
| half-subtracter; one-digit subtracter; two-input subtracter | |||
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| two-input subtracter | |||
| one-digit subtracter | |||
| half subtracter | |||
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半减 器 : 6 phrases in 5 subjects |
| Automobiles | 1 |
| Computers | 1 |
| Metallurgy | 1 |
| Space | 1 |
| Technology | 2 |
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