They are used in TV, telecamera,audio andvisual recorder,microprocessor and other electronic equipment for resonance ,osilating coupling, delay, filter, trap, choke and etc.

用于电视机、摄象机、录象机、微处理机和其他电子设备中起谐振、振荡、耦合、延迟、滤波、陷波、扼流等作用。