ballast

• Fluorescent lamp reference ballasts , specifications for
  荧光灯标准镇流器规范
• Self ballasted fluorescent lamps for general lighting
  一般照明用自镇流荧光灯
• Ac supplied electronic ballasts for fluorescent lamps
  荧光灯用交流电子镇流器
• Lighting chains ; ballasts for tabular fluorescent lamps
  管形萤光灯镇流器；
• Aggregates for railway ballast ; german version en 13450 : 2002
  铁道路基用集料
• Codes of disinfection for ballast water in entry - exit ships
  入出境船舶压舱水消毒规程
• Ballasts for high pressure mercury vapour lamps
  高压汞蒸汽灯镇流器.修改件2
• ( 5 ) adding and settling of ballast in delamination
  ( 5 )分层上碴和整道。
• Electronic ballast for t5 fluorescent lighting tube
  T5型荧光灯电子镇流器
• A . c . supplied electronic ballasts for railway passenger car
  铁道客车用交流电子镇流器