通过二、三值逻辑开关函数间的转换，系统地描述了三相CSR三值逻辑PWM信号发生中的状态切换；
A systematic description of the state switching in trilogic PWM signal generation of three-phase CSR by using the conversion between bilogic and trilogic switching functions.
分析了静态转换开关（STS）的无环流切换控制的工作原理。
The control theory for static transfer switch(STS) without circulation current is elaborated.
所设置的工作转换开关可以切换人体感应报警、人体感应与空气振动同时报警。
The arranged work change-over switch can alarm simultaneously by changing over the inductive alarm of human body, the induction of human body, and the air vibration.
所设置的工作转换开关可以切换人体感应报警、人体感应与空气振动同时报警。
The arranged work change-over switch can alarm simultaneously by changing over the inductive alarm of human body, the induction of human body, and the air vibration.
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