SILAGE AND LIQUID MANURE CONTAINERS, CONTAINERS IN BIOGAS PLANTS, BUNKER SILOS AND TRENCH SILOS - PART 22: CONCRETE BLOCKS ACTING AS LOST FORMWORK FOR SILAGE AND LIQUID MANURE CONTAINERS, BUNKER SILOS AND TRENCH SILOS AND LIQUID MANURE CHANNELS
German Institute for Standardisation (Deutsches Institut für Normung)