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| 螺旋形盘管 | |||
| coil helical: 13 phrases in 8 subjects |
| Automobiles | 1 |
| Compressors | 2 |
| Drilling | 1 |
| Electric machinery | 1 |
| Electronics | 1 |
| Metallurgy | 2 |
| Oil / petroleum | 1 |
| Technology | 4 |
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