DIN 19551-3:2002 Wastewater treatment plants - Rectangular tanks - Part 3: Grit chambers with suction type sludge remover and sludge scraper; Types, main dimensions, equipment
2002DIN 19551-3:2002-12 Wastewater treatment plants - Rectangular tanks - Part 3: Grit chambers with suction type sludge remover and sludge scraper; Types, main dimensions, equipment
2002DIN 19551-3:2002 Wastewater treatment plants - Rectangular tanks - Part 3: Grit chambers with suction type sludge remover and sludge scraper; Types, main dimensions, equipment