极长的换油周期，使用寿命是矿物油的6~8倍。
Extremely long oil cycle, service life is 6 ~ 8 times mineral oil.
一个极宽的可编程频率范围允许时钟以一个1 ms至9.5小时的周期运作。
An extremely wide programmable frequency range allows the clock to operate with a period from 1ms to 9.5 hours.
本文利用路-阵方法分析了对数周期偶极天线。
A log periodic dipole antenna is analyzed by using circuit array approach.
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