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| эффективное отверстие | |||
| эффективная апертура | |||
| диаметр действующего отверстия | |||
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有 效孔径 : 7 phrases in 6 subjects |
| Antennas and waveguides | 1 |
| General | 1 |
| Geology | 1 |
| Photography | 1 |
| Polygraphy | 1 |
| Technology | 2 |
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