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| mechanical timer; timing mechanism (тока) | |||
| beam chopper (пучка); chopper (пучка); mechanical chopper яд.физ. (пучка) | |||
| mechanical chopper | |||
| mechanical interrupter | |||
| механический прерыватель: 7 phrases in 4 subjects |
| Construction | 2 |
| High energy physics | 3 |
| Metallurgy | 1 |
| Nanotechnology | 1 |