On Circuit Switching of Instruments
Guoqing Zhao · 2002
According to the application purpose, circuit switching of instruments can be divided into emergency substitution, cross substitution and complementary substitution. the application purpose of circuit switching of instruments was extended from the repair to the function expansion. The corresponding examples can be regarded as experience accumulation of authors; they have good practical value and can be served as good explanations of classification of circuit switching as well.