"Development Of A Technical Expert Opinion Assessing The Technical Condition Of The Left Flood Shaft Of The Łęg-Klewiec Leader At 0+000-7+650 And Right Flood Shaft Of The Łęg-Klewiec Leader At 0+000-7+644 Grębów Commune, Tarnobrzeg Poviat, Podkarpackie Voivodeship."