







low frequency band
That proves the rail vibration is whole-vibration.
It leads to higher harmonics amplitudes in lower frequency range.

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Open the tool →低频段 (dī pín duàn) means “low frequency band”.
低频段 is pronounced dī pín duàn in Mandarin Chinese.
“low frequency band” is 低频段 (dī pín duàn) in Chinese.
This page has 2 example sentences using 低频段, each with pinyin and an English translation.