频率计不好用了, 需要更换.The frequency meter is not in effectiveness, to be renewed.数字频率计是一种基本的测量仪器.Measurement of time - frequency electronic measurement is an important area.介绍了数字频率计设计的基本原理.This paper has introduced the basic pri...

“频率计”的英语可以翻译为：[计] cymometer，[化] frequency meter ...