7
Machines for generating energy, in particular electricity
11
Machines and installations for the processing and treatment of waste water of all kinds, machines and installations for the processing and treatment of sludge of all kinds, machines and installations in connection with sludge tanks, sludge collectors, sludge filters, sludge digestion and sludge fermentation installations, machines and installations for the thickening, dewatering and separation of sludges, machines and installations for waste disposal, in particular sludge disposal, sanitary apparatus and installations, machines for generating energy, in particular gas and electricity, including all the aforesaid machines and installations being parts for waste water clarifying installations; apparatus for heating, steam generating, cooking, refrigerating, drying, ventilating and water supply purposes, in particular for machines and installations for the processing and treatment of waste water of all kinds, machines and installations for the processing and treatment of sludge of all kinds, machines and installations in connection with sludge tanks, sludge collectors, sludge filters, sludge digestion and sludge fermentation installations, machines and installations for the thickening, dewatering and separation of sludges, machines and installations for waste disposal, in particular sludge disposal, sanitary apparatus and installations, installations for generating energy, in particular gas and electricity, including all the aforesaid machines and installations being parts for waste water clarifying installations
40
Treatment of materials, in particular by means of and in connection with machines and installations for the processing and treatment of waste water of all kinds, machines and installations for the processing and treatment of sludge of all kinds, machines and installations in connection with sludge tanks, sludge collectors, sludge filters, sludge digestion and sludge fermentation installations, machines and installations for the thickening, dewatering and separation of sludges, machines and installations for waste disposal, in particular sludge disposal, sanitary apparatus and installations, machines for generating energy, in particular gas and electricity, including all the aforesaid machines and installations being parts for waste water clarifying installations; treatment of materials, including for separating and processing a mixture of water and organic sludges