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| диффракционный эшелон | |||
| ступенчатая решетка | |||
| эшелон | |||
| эшелле; эшель; ступенчатая решётка | |||
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阶梯光栅 : 12 phrases in 3 subjects |
| General | 5 |
| Medical | 1 |
| Technology | 6 |
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