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| Lichtarbeit f (the product of the luminous flux by the time it is maintained; unit: lumen-hour, Im-hr); Lichtmenge f (the product of the luminous flux by the time it is maintained; unit: lumen-hour, Im-hr) | |||
| Lichtenergie f | |||
| Lichtmenge f | |||
| Beleuchtung f | |||
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quantity of light : 1 短语, 1 学科 |
| 光学（物理学分支） | 1 |