Power supply: Two Power supply for this reading lamp: One is AC-DC, the other is DC-DC, they all are constant current circuit keep high-power LED constant and steady brightness是什么意思_Power supply: Two Power supply for this reading lamp: One is AC-DC, the other is DC-DC, they all are constant current circuit keep high-power LED constant and steady brightness在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句