- bifocal segment
- 双焦点透镜段
Medical Chinese dictionary (湘雅医学词典). 2013.
bifocal segment
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paster — The segment forming the part for near vision in two piece bifocal lenses. * * * pas·ter (pāsґtər) the portion of a bifocal lens ground for near vision … Medical dictionary
focal — focal, ale, aux [ fɔkal, o ] adj. et n. f. • 1812; du lat. focus « foyer » 1 ♦ Phys. Qui concerne le foyer, les foyers d un instrument d optique. ⇒ bifocal. Axe focal, plan focal. N. f. Distance focale. Objectif à focale variable. ⇒ zoom. 2 ♦… … Encyclopédie Universelle
