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1.问题的提出移相器是实现并机工作不可缺少的一个装置。为了减少停播,我们将原来的手倒备份改为自动倒备份。手倒备份的执行机构是具有三对常开接点和三对常闭接点的直流继电器。控制部分则是
1. The problem proposed Phase shifter is to achieve an indispensable work of a device. In order to reduce the interruption of broadcasting, we changed the original manual backup to automatic backup backup. The backup actuator is a DC relay with three pairs of normally open contacts and three pairs of normally closed contacts. The control part is