standard frequency generator 标准频率发生器

standard high frequency signal generator 标准高频信号发生器

high-frequency standard vibration generator [力] [计量] 高频标准振动装置

medium frequency standard vibration generator [力] 中频标准振动装置

low-frequency standard vibration generator [力] 低频标准振动装置

low frequency standard vibration generator 标准低频振动装置

high-frequency laboratory standard signal generator 实验室用高频标准信号发生器

frequency laboratory standard signal generator 实验室用高频标准信号发生器