42 Technical testing and surveying for quality control purposes of conveyors, air supply conditioning units, industrial dryers for heating and dehumidifying, exhaust air purification units and waste water treatment units; science and technology design services in connection with automatic plants of surface technology, conveyors, air supply conditioning units, industrial dryers for heating and dehumidifying, exhaust air purification units and waste water treatment units; research and development in relation to automatic plants of surface technology, conveyors, air supply conditioning units, industrial dryers for heating and dehumidifying, exhaust air purification units and waste water treatment units, plants composed of automatic plants of surface technology, conveyors, air supply conditioning units, industrial dryers for heating and dehumidifying, exhaust air purification units and waste water treatment units; industrial research in relation to automatic plants of surface technology, conveyors, air supply conditioning units, industrial dryers for heating and dehumidifying, exhaust air purification units and waste water treatment units, plants composed of automatic plants of surface technology, conveyors, air supply conditioning units, industrial dryers for heating and dehumidifying, exhaust air purification units and waste water treatment units; design and development of computer programs for automatic plants of surface technology, conveyors, air supply conditioning units, industrial dryers for heating and dehumidifying, exhaust air purification units and waste water treatment units, plants composed of automatic plants of surface technology, conveyors, air supply conditioning units, industrial dryers for heating and dehumidifying, exhaust air purification units and waste water treatment units; technical consulting services for the development and planning of conveyor belts, air supply conditioning units, industrial dryers for heating and dehumidifying, exhaust air purification units and waste water treatment units, plants composed of automatic plants of surface technology, conveyors, air supply conditioning units, industrial dryers for heating and dehumidifying, exhaust air purification units and waste water treatment units; technical consultancy in the field of painting plants, conveyor belts, air supply conditioning units, industrial dryers for heating and dehumidifying, exhaust air purification units and waste water treatment units, plants composed of automatic plants of surface technology, conveyors, air supply conditioning units, industrial dryers for heating and dehumidifying, exhaust air purification units and waste water treatment units; programming and installation of software for automatic plants of surface technology, conveyors, air supply conditioning units, industrial dryers for heating and dehumidifying, exhaust air purification units and waste water treatment units, plants composed of automatic plants of surface technology, conveyors, air supply conditioning units, industrial dryers for heating and dehumidifying, exhaust air purification units and waste water treatment units