功能及用途：该控制器输出脉冲时序，能使烧嘴大、小火焰有规律地
循环切换。广泛用于脉冲燃烧控制的工业炉窑上。
Function & Application: The controller outputs pluse time-sequences
to make the high and low flames of the burner switch with each other
regularly. It is widely used in the pulse combustion control system
of industrial furnaces.
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