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| 双级氨-水吸收式制冷机 | |||
| ammonia-water absorption refrigerating machine with two stage absorption process: 2 phrases in 1 subject |
| Refrigeration | 2 |
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| 双级氨-水吸收式制冷机 | |||
| ammonia-water absorption refrigerating machine with two stage absorption process: 2 phrases in 1 subject |
| Refrigeration | 2 |