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| 低电平有效 | |||
| English thesaurus | |||
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| negative (ssn); negative true (ssn) | |||
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active low : 18 phrases in 7 subjects |
| Air defense | 1 |
| Aviation | 3 |
| Earth sciences | 1 |
| Electronics | 6 |
| General | 1 |
| Space | 4 |
| Technology | 2 |
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