wattn.瓦特Watt s linkage瓦特连杆机构watthour meter累积瓦特计watt-seconds瓦秒(焦耳-热量单位)watt transducer电功率传感器watt hour meter瓦时计,电度表,积算瓦特计watt per candle瓦烛光wattful current有功电流Watt's governor飞球调速器watt consumption功率消耗watt-hour data电能量数据