switcher调车机车switchn.转换；开关；鞭子v.改变；交换；转换；鞭打switching sites转换位点switching stage转换级switching spilk开关尖峰switching table[计] 开关表switching blank空交换switched system交换系统switching relay转换继电器switching array切换矩阵switching-offn.断开；关掉；开闸；掉闸switched access交换接入