Left two diagrams are the circuit for single, double tubes with quick starting.Diagrams for three, or four tubes are combined by the ones for single or double tubes.是什么意思_Left two diagrams are the circuit for single, double tubes with quick starting.Diagrams for three, or four tubes are combined by the ones for single or double tubes.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句