reference ballast造句

fluorescent lamp reference ballasts, specifications for
荧光灯标准镇流器规范
reference ballasts-high-intensity-discharge and low-pressure sodium lamps
标准镇流器.高亮度放电和低压钠灯
reference ballasts for high-intensity-discharge lamps-methods of measurement
高亮度放电灯用标准镇流器.测量方法
It's difficult to find reference ballast in a sentence. 用reference ballast造句挺难的