- flange focal distance
- 基面: cardinal plane; datum; inter ...
- 焦距: focal distance; focal length
- 基面: cardinal plane; datum; [地质学] interarea
- 焦距: [光学] focal distance; focal length 调焦距 focalize; 焦距计 focometer; focimeter; 焦距检定 focal length calibration; 焦距调整 focal setting; focalization; setting of focal length
- 波基面: wave base
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