Comminution machines and their parts, namely, cone crushers and roller crushers for the cement, coal, mineral and metal industry; mills and their parts in the nature of presses as machines for industrial purposes, roller mills, hammer mills, ball mills for the cement, coal, mineral and metal industries; presses, namely, roller presses; machine parts, namely, mill stones and annular casings with and without hard bodies for milling or pressing rollers; machines and their parts for separating fine bulk goods, namely, wind, cascade and rod basket sifters; sorting machines and their parts, namely, wet sorting machines, jigging machines, flotation machines and magnetic graders; controllers and their parts for machines or motors, namely, control mechanisms for machines in the nature of frequency converters; Machines and their parts for the chemical industry and for the cement, coal, mineral and metal industry, namely, aerators, belt conveyors, belts for conveyors, boiler tubes as parts of machines, compressed air pumps, converters for steel works, disintegrators, earth moving machines, electromechanical machines for the chemical industry, engines or motors, filtering machines, grinding machines, haulage apparatus for use in mining and for use in a cement product plant, heat exchangers as parts of machines, mechanical discharging hoppers, mine borers, mine working machines, mud catchers and collectors as machines, ore treating machines, pneumatic transporters, pneumatic tube conveyors, regulators as parts of machines, rolling mills, separators, shredders as machines for industrial use, sieves as machines or as parts of machines, sifters, sifting installations, steam condensers, steamrollers, stone working machines, suction machines for industrial purposes, thermic lances used in rotary kilns for cement production and waste incineration for producing heat for cement production, vibrators as machines for industrial use, water separators; roller plate mills and vertical mills for the cement, coal, mineral and metal industry; briquetting machines