During hot weather, the city’s electrical system is often overloaded by fans and air conditioners.

天气炎热时, 这座城市的力系统常常因风扇和空调器的使载。

The paper analyses a digital swither overload control strategy using a GSPN model.

论文使广义随机Petri网对一个数字交换机的载制模型进行了分析。

The newly fitted parts are the current overlad automatin protection system,the direct viewing ammeter and the power-supply control switch.

新设流载自动保护系统，直流表及源制开关。