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Number  Name Description (tasks and duties) Unit Groups 


Crushers, Grinders and MixersWorkers in this unit group crush, grind, mix and blend chemicals and other materials employed in chemical and related processes. Their functions include: reducing solid chemicals and related materials to suitable size for further processing; grinding and pulverising solid chemicals and related materials; mixing or blending solids or liquids used in chemical and related processes; performing related tasks.Operators of crushing machines employed in ore-treating are classified in 7-12.30.
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