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| 设备管道系统, 建筑物中的管道系统。 | |||
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piezas : 25 phrases in 10 subjects |
| Animal husbandry | 1 |
| Chemical fibers | 1 |
| Entomology | 1 |
| Hydrology | 4 |
| Knitted goods | 5 |
| Mathematics | 2 |
| Technology | 1 |
| Transport | 1 |
| Welding | 2 |
| Wood processing | 7 |
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