这些高频率与离心机的转速相对应；美国对能够以600赫兹以上频率运行的频率转换器驱动的出口进行了严格管控。
These high frequencies correspond to the rotation speeds of centrifuges; America tightly controls the export of frequency converter drives able to operate at frequencies above 600 Hz.
这些高频率与离心机的转速相对应；美国对能够以600赫兹以上频率运行的频率转换器驱动的出口进行了严格管控。
These high frequencies correspond to the rotation speeds of centrifuges; America tightly controls the export of frequency converter drives able to operate at frequencies above 600 Hz.
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