平衡杆式接地远距继电器
balanced beam type ground distance relay
光电式继电器电表
photoelectric relay meter
电流补偿式接地远距继电器
current compensational ground distance relay
分域高速远距继电器
multi-zone high-speed distance relay
测杆式平衡
balancing with measuring rod
电流平衡式电流差动继电器
current balance type current differential relay
杠杆平衡式钟形压力计
balanced-level-type bell gauge