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| 液压空气液压控制 | |||
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| 流体控制; 液力〔液压〕控制 | |||
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fluid- control : 35 phrases in 14 subjects |
| Automobiles | 2 |
| Aviation | 4 |
| Chemistry | 1 |
| Compressors | 1 |
| Drilling | 5 |
| Electronics | 2 |
| Mechanics | 1 |
| Medicine - Alternative medicine | 1 |
| Metallurgy | 4 |
| Mining | 1 |
| Nuclear physics | 1 |
| Oil / petroleum | 3 |
| Space | 5 |
| Technology | 4 |