File: - 26regionsfm_2021_43_shorts.zip ...

: Likely refers to Frequency Modulation (radio broadcasting). 2021_43 : A timestamp for late October 2021 (Week 43).

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Files with this specific nomenclature are frequently associated with: : Likely refers to Frequency Modulation (radio broadcasting)

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: Technical parameters for FM transmitters, including frequencies, power levels, and antenna patterns for different administrative regions.