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| woolly-type engine (мощный двигатель с малым числом оборотов) | |||
| slow-speed engine | |||
| slow-speed motor | |||
| slow engine; slow-running engine; low speed engine | |||
| slow speed engine | |||
| low-speed engine | |||
| low-speed motor | |||
| тихоходный двигатель: 8 a las frases, 5 temas |
| Campos de petróleo | 1 |
| Energía solar | 1 |
| Náutico | 3 |
| Petróleo | 1 |
| Tecnología | 2 |