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| 脉冲塔; 脉动塔 | |||
| 脉冲抽提塔; 脉动柱 | |||
| 脉冲柱 | |||
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| 脉冲塔 | |||
| pulse- column: 7 phrases in 3 subjects |
| Chemistry | 1 |
| Metallurgy | 4 |
| Oil / petroleum | 2 |
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