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| |||
| inspection window; peep-hole; observation hole; sight glass | |||
| observing cover (Totoshka) | |||
| sight glass (применительно к кондиционеру) | |||
| Flame Plate (Valita) | |||
| observation window (напр. топливной или масляной ёмкости) | |||
| смотровое окошко: 4 phrases in 4 subjects |
| Automated equipment | 1 |
| Natural resourses and wildlife conservation | 1 |
| Packaging | 1 |
| Rail transport | 1 |