Subject	English	Chinese
tech.	audio-frequency shift modulated track circuit	移频轨道电路
railw.	automatic block with audio frequency shift modulated track circuit	移频自动闭塞
tech.	automatic block with audio frequency shift modulated track circuits	移频自动闭塞
el.	binary-frequency-modulated differentially coherent phase shift keying	二进制调频差分相干移相键控
railw.	frequency shift modulated automatic block	移频自动闭塞
railw.	frequency-shift modulated track circuit	移频轨道电路
el.	minimum shift keying using a frequency modulated subcarrier	使用调频副载波的最小移频键控