It adds time delay to the controlling system that can control the time delay system inerrably and overcome the shortcomings of the traditional approximation method.

该方法将时间滞后因子自然纳的控机，可完全无误差的实现对时滞的控，克服了传近似法解决时滞所带来的误差问题。

Besides, We indicated the main adavantages of this means and probable way of overcoming its shortage, that is, method of difference value of isoporic lines is used to process data of some stations.

另,指出了该手段的主要优点及克服其缺点的可能途径,即有些台站可采用地磁等变线差值法处理。