The speed, of response of the synchronous condenser is greatly influenced by the effective time constant of the field, which is typically 2-3 seconds.
同步调相机的响应速度受励磁磁场时间常数影响很大，时间常数一般为2—3秒。
CONCLUSION plasma concentrations of sodium ferulate porosity osmotic pump tablets are constant and effective plasma drug concent-ration is kept for a long time.
结论阿魏酸钠微孔渗透泵片血药浓度平稳，可较长时间保持血药浓度。
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