excavating machinery
2.NHI mainly provides research and development, design, manufacturing and services of the significant technology equipments of crushing &grinding, ore dressing, metal rolling and dressing shearing, tunnel boring, bulk material transporting and handling, synthetic excavating, construction machinery, transmission machinery, particle board, environmental protection and military and large castings and forgings for metallurgy, mining, coal, power, building material, port, chemical industry, environment industries.
