论文部分内容阅读
大多数近代的控制任务已不能依靠用普通的电磁继电器的转换设备来解决,因为它具有运动部份,所以寿命有限,此外具有较长的转换时间。
Most of the modern control tasks cannot be solved by using a common electromagnetic relay switching device because it has a moving part and therefore has a limited life, and also has a long switching time.