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| pressure difference | |||
| air pressure difference | |||
| draught head; draft head | |||
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气 压差 : 45 phrases in 14 subjects |
| Agriculture | 5 |
| Automobiles | 1 |
| Chemistry | 1 |
| Electric machinery | 1 |
| General | 5 |
| Metallurgy | 3 |
| Nursing | 3 |
| Oil / petroleum | 1 |
| Polymers | 1 |
| Rail transport | 3 |
| Refrigeration | 1 |
| Shipbuilding | 1 |
| Surgery | 1 |
| Technology | 18 |
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