42 Technical order development for design and products, namely, conducting feasibility studies, product development, product development consultation, product research, product research and development, mechanical engineering and research, and material testing; technical consulting and research in the fields of industrial planning, product planning, product development, design and testing of new products for others, and research and development for new products for others; technical consultation in the fields of industrial planning, product planning, product development and product manufacturing, and assembly and preassembly of mechanical products, components and units