 |
| |||
| entrance aperture (of а collimator) | |||
| entrance aperture; entrance port (e.g. of an integrating sphere) | |||
| inlet hole; admitting port | |||
| eye; inlet | |||
| well intake (Brunnen) | |||
| entrance pupil | |||
| admission port; entrance port; inlet port | |||
| input aperture | |||
| intake orifice; intake vent | |||
| Eintrittsoffnung: 4 短语, 2 学科 |
| 光学（物理学分支） | 1 |
| 运输 | 3 |