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| push-pull; push-pull operation | |||
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| push-pull | |||
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push-pull" : 14 phrases in 9 subjects |
| Chemistry | 1 |
| Computers | 2 |
| Earth sciences | 1 |
| Electronics | 3 |
| Information technology | 2 |
| Mechanic engineering | 2 |
| Metallurgy | 1 |
| Natural sciences | 1 |
| Transport | 1 |
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