Stirrers, namely, agitators and mixers; machines, namely, mechanical mixers; presses; pumps for machines; hydraulic pumps; recycling pumps; transfer pumps for biogas plants; pump diaphragms; parts of machines, namely, valves; gates as parts of machines; machines in the nature of mud catchers and collectors; solid-liquid separation apparatus for the treatment of fluid-containing waste; sludge composting apparatus; waste dewatering composting apparatus; electric motors for machines; aerators be...