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neutral density
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| neutral density | |
| avia. | 中性密度; 减光镜; 黑白密度 |
| chem. | 中和 密度 |
| earth.sc. | 中和密度; 中性浓度 |
| filter | |
| gen. | 过滤 |
| environ. | 过滤器 |
| math. | 滤波器 |
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| 中性密度; 减光镜; 黑白密度 | |||
| 中和性密度 | |||
| 中和密度; 中性浓度 | |||
| 灰密度 | |||
| neutral density: 30 phrases in 11 subjects |
| Aviation | 5 |
| Cartography | 1 |
| Chemistry | 2 |
| Electronics | 1 |
| Multimedia | 2 |
| Polygraphy | 2 |
| Remote sensing | 1 |
| Space | 1 |
| Technology | 13 |
| United States | 1 |
| Wind Energy | 1 |
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