短语词组短語watt -hour meter check 電能表校騐standard watt -hour meter 標準瓦時計ZB Watt -hour meter ZB型電能表special watt -hour meter 特種電能表rate watt -hour meter 費率電能表digital watt -hour meter 電子式電能表civil watt -hour meter 民用電度表 返回 watt hour meter