German standard methods for the examination of water, waste water and sludge - Parameters characterizing effects and substances (group H) - Part 56: Gravimetric determination of low volatile lipophilic substances after solvent extraction (H 56)— 11 стр.
Self adjusting valves operated on auxiliary energy; regulating device with or without shutting-off (zero-shut-off), class R<(Index)m> and R<(Index)o>— 2 стр.