Machine tools for mechanical process engineering purposes, namely, size reduction machine for comminuting of crumbly materials, inert materials, plastic materials, organic materials, pigments, minerals, elastomers and synthetics, food and feed stuff, especially for the fine and finest grinding; grinding machines for the dry and wet grinding of soft to hard materials, especially minerals, plastics, wood, food and feed stuff, fibers; mills being machines for comminuting of crumbly materials, in...