42 Engineering with regard to machines, machine tools, machines for processing plastic materials, machines for processing packaging materials, machines for manufacturing hollow bodies of plastic, machines for manufacturing bottles and other containers; engineering with regard to conveyors, pallet wrapping machines, bulk filling machines, labellers, preform feeder machines, preform orientation machines and tray packers; technical suveying and engineering in the fields of the manufacture of packaging, containers, plastic materials, plastics working, preform manufacturing, container manufacturing, bottle and container design; technical surveys, engineering in the fields of the processing of packaging materials and containers of plastic, in particular for improving barrier properties and gas tightness; technical surveys, engineering in the fields of the labelling of containers, the conveying thereof, the stuffing thereof, the wrapping thereof, the tray packing thereof; technical surveying and engineering with regard to the development, lapping, repair and improvement of machines, machine tools, machines for processing plastic materials, machines for processing packaging materials, machines for manufacturing hollow bodies of plastic, machines for manufacturing bottles and other containers; technical surveys and engineering with regard to the development, lapping, repair and improvement of conveyors, pallet wrapping machines, bulk filling machines, labellers, preform feeder machines, preform orientation machines and tray packers