converter
(1)转换器
(2)换能器
(3)变流器
(4)变频器

• sodium fluoride
• sodium hydroxide
• sodium lamp
• sodium light
• sodium line index
• sodium nitrate
• sodium sulphite
• sodium tetraborate decahydrate
• sodium vapour lamp
• soft aperture
• soft balsam
• soft coating
• soft copy
• soft corneal lens
• soft crown glass
• softener
• softening
• softening point
• soft focus
• soft-focus lens
• Soft (hydrophilic) contact lens
• Soft (hydrophilic) contact lens care products
• soft light
• soft mode
• soft mold blocking