ratio-balance relay

例句：

1. 1. The ratio-balance relay is used in the control system to ensure accurate measurement and data transmission.
   比率平衡继电器用于控制系统中，以确保测量准确和数据传输。
2. 2. In this experiment, the ratio-balance relay was used to switch between two circuits.
   在这个实验中，比率平衡继电器被用来在两个电路之间切换。
3. 3. The ratio-balance relay is a critical component of the safety system, ensuring that the correct ratio of gasesis maintained.
   比率平衡继电器是安全系统的关键组件，确保气体的正确比例得到维持。