短語(yǔ)詞組短語(yǔ)train operation by signal indication 按信號(hào)顯示行車micro -operation signal generator 微操作信號(hào)發(fā)生器signal operation 信號(hào)控制;信號(hào)操作;信號(hào)節(jié)制signal operation instruction 通信作業(yè)須知small signal operation 小信號(hào)操作signal operation circuit 信號(hào)運(yùn)算電路reverse travel signal operation 倒退行駛信號(hào)的工作signal operation instructions 通信作業(yè)教令;信號(hào)操作指令large signal operation 大信號(hào)操作 返回 operation signal