directional wattmeter

例句：

1. 1. The directional wattmeter is used to measure the power consumption in different directions.
   方向性瓦特表用于测量不同方向的功率消耗。
2. 2.The directional wattmeter can accurately reflect the actual power usage situation.
   方向性瓦特表能准确反映实际的用电情况。
3. 3.The directional wattmeter is an essential tool for monitoring energy efficiency in industrial settings.
   方向性瓦特表是工业环境中监控能源效率的重要工具。