Qeyri-ənənəvi enerji istehsalı Videodərs 4 ( Günəş enerjisindən istifadə edilməsi )

New channel Sumqayıt Dövlət Universiteti: title sample judged 'pick' (Nearly all uploads are structured university video lectures across multiple courses, with a small number of promo/annive); passed a second screen for sellers/exam-prep/re-uploads; 2 of 3 sampled transcripts showed teaching, 0 not; titles picked one by one, checked strictly; oEmbed verified.