Installation Of Decorative Paving Stones And The Floor Of Classes Of Secondary School No. 26 J. Balkhi (Device Of Screeds Of Cement Tu 20Mm, Laminate Coatings, A Plinth Device And A Ceramic Floor And Screeding Device Up To 60X60Cm) Norma Safolak Io Oroishӣ Wa Farzi Cinfhonaҳyoi Muissai Taҳsiloti Miyunai Umumi No. 26 But Ҷiya Ҷ. Balkhi