前面板锁。
FLOCK button. Pressing the frequency Lock button will disable all frequency determining controls on the front panel, to prevent accidental changes of frequency.
频率锁定，按下这个按钮前面板所有频率控制按钮将被禁用，防止意外改变频率。
FLOCK button. Pressing the frequency Lock button will disable all frequency determining controls on the front panel, to prevent accidental changes of frequency.
按下频率锁定按钮前面板所有频率控制按钮将被禁用，防止意外改变频率。
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