7 Machines for railway construction, repair and maintenance; rail-laying machines; machines and machine tools for installing and replacing railway sleepers; welding machines; rail saws; grinding machines; drilling machines; ballast tamping machines; rail reprofiling machines; rail polishing machines; machines for installing, removing, tightening and loosening rail fastenings and bolted components; lifting apparatus and machines; jacks [machines]; lifting apparatus for the handling of railway goods; conveyors; hydraulic tools; engines (except engines for land vehicles); couplings and drive belts (except for land vehicles); welding machines; welding machines; parts, fittings and accessories for the aforesaid goods.