commutator type watthour meter

例句：

1. 1.The new energy-saving device is a commutator type watthour meter.
   这款新型节能设备是一款交流器类型瓦时计。
2. 2. The engineer used the commutator type watthour meter to measure the power consumption of the machine.
   工程师使用交流器类型瓦时计来测量机器的功率消耗。
3. 3. The commutator type watthour meter was an essential tool for monitoring energy usage in industrial settings.
   交流器类型瓦时计是工业环境中监控能源使用的关键工具。