This series adopt high accurate synchromotor as power source and take powersupplyfrequency as time datum.
该系列定时器采用高精度同步电机为动力源，以电源频率为时间基准。
2
On the basis of the studies above, the minimum powersupplyfrequency favorable to uniform glow discharge was formulated.
在此基础上，根据大气压下有利于均匀辉光放电的放电条件，最终推算出有利于均匀辉光放电的最小电源频率。
3
This series timers adopt high accurate synchromotor as power source and take powersupplyfrequency as time datum. There are many specifications in time setting from 30 min. to 24 hours.