Has a microphone with a single directivity and a wide frequency range.
频率范围宽的单指向性话筒，高质量的拾音效能。
Frequency power head, adjusting speed arbitrary, wide speed range.
变频动力头，转速任意调节，作用范围广。
Design of computer controlled wide range frequency response measurement system is introduced.
介绍了计算机控制的宽带频率特性测试系统的设计。
A digitally precisely controlled motor can vary test frequency and strain over a wide range.
高精度数控马达在大范围内改变侧试频率和应变。
Low loss at wide range of frequency.
在大范围频率使用上低损耗。
Low loss at wide range of frequency.
在大范围频率使用上低损耗。
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