Heat exchangers being parts of machines; Inert elements for the pyrolysis, thermolysis or gasification of organic matter (balls, tori, cylinders or ovoid balls for waste disposals, being parts of machines); Mixing machines; Mills (machines); Cinder sifters (machines)
MachineryApparatus for the purification of gases; Heat accumulators; Heating apparatus for solid, liquid or gaseous fuels; Apparatus for heating; Heating elements; Heat exchangers, other than parts of machines; Inert elements for incinerators (heating elements for incinerators); Inert elements for the pyrolysis, thermolysis or gasification of organic matter (balls, tori, cylinders or ovoid balls for gas production and purification apparatus, being heating elements); Industrial treatment installations
Environmental Control Apparatus