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。
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。
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。
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