折射器 meaning in English

deflector
refractor

Ophthalmic instruments - refractor heads
眼科仪器.折射器突出部
Refractors used with enclosed side - mounted luminaires for horizontal - burning high - intensity - discharge lamps , mechanical interchangeability of
水平发光高亮度放电灯用封闭侧装式照明装置的折射器的机械互换性
Roadway lighting equipment - enclosed side - mounted luminaires for horizontal - burning high - intensity discharge lamps - mechanical interchangeability of refractors
道路照明设备.横向点燃高强度放电灯用封闭侧装式灯.折射器的机械可互换性