MFJ-299与 270，540，1000，和 2000个赫兹的中央频率一起装备一个内建的绘画似的使相等的东西。
MFJ-299 is equipped with a built-in graphic equalizer with center frequencies of 270, 540, 1000, and 2000 Hz.
感染的高频率与侵入设备的使用，特别是中央线，导尿管和通风设备密切相关。
High frequency of infection is associated with the use of invasive devices, in particular central lines, urinary catheters, and ventilators.
前项检验实施之对象、区域、频率及期限，由中央主管机关订定公告。
The central competent authority shall determine and officially announce the targets, regions, frequency and deadlines for the performance of the testing in the foregoing paragraph.
前项检验实施之对象、区域、频率及期限，由中央主管机关订定公告。
The central competent authority shall determine and officially announce the targets, regions, frequency and deadlines for the performance of the testing in the foregoing paragraph.
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