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| permeability efficiency | |||
| transmittance (the ratio of radiant flux reflected from a surface to that incident upon it); transmission efficiency; light transmittance efficiency; transmittancy; efficiency (ratio between the effective exposure time and total open time of a shutter) | |||
| transmission factor; transmittance; transmittivity V | |||
| Durchlaßgrad: 6 phrases in 2 subjects |
| Optics branch of physics | 3 |
| Physics | 3 |