7 Machines, parts of machines and equipment for use in the treatment and production of chemicals and petrochemical products and metallurgical coke, namely, machines for the treatment of crude gas, namely, machines for electrostatic gas discharge, gas desulphurization, removal of ammonia, debenzolation, denapthaliation, removal of nitrogen oxide, and gas compression, and parts to said machines, namely, columns, compressors, vacuum pumps and valves; machines used for the production of sulfur and sulfuric acid, ammonia salts and ammonia, hydrogen synthesis gas, crude tar, naphthalene, crude phenol, for tar distillation, and for production of tar based products, crude benzene, and for ammonia decomposition; machines for charging and discharging coal, and machines for crushing, sieving, dosing and mixing coal, and dust removal units; coke crushing and sieving machines, flue gas treatment equipment, namely, units for dust removal, desulphurization, nitrogen dioxide removal and. for separating other impurities; coke pushing machines; coke cake guide machines; coke transfer machines with integrated extraction hoods; coke-side dust removal units; machines for the mechanical cleaning of coke oven doors and chamber frames; equipment for cleaning standpipes and charging holes; high-pressure door cleaning units; oven-roof dust removal machines; ramming machines; equipment for use with coke dry quenching units, namely, cranes; apparatus for conveying and lifting goods and loads in the field of coal, coke and petrochemical residues, namely, belt conveyors, chain conveyors, roller tables, carrying and traction cables, grabs and their driving gear, consisting of gears and motors, not for land vehicles; winches for use with quenching cars; engine shunts for quenching cars; quenching engines