Stroje na dopravu látek 1SI 2023/2024 1SI Úvod do strojního inženýrství

New channel Josef Štětina: title sample judged 'whole' (Nearly all long uploads are full university lectures and technical explainers on thermomechanics and combustion engines,); passed a second screen for sellers/exam-prep/re-uploads; 0 of 3 sampled transcripts showed teaching, 0 not; titles picked one by one, checked strictly; oEmbed verified.