Manufacturing of specialized machinery for agriculture, forestry, animal husbandry, sideline production, and fishery; sales of specialized machinery for agriculture, forestry, animal husbandry, sideline production, and fishery; manufacturing and sales of animal husbandry machinery; manufacturing and sales of environmental protection special equipment; manufacturing and sales of domestic waste treatment equipment; manufacturing and sales of feed production special equipment; manufacturing and sales of fishery machinery; manufacturing and sales of mechanical and electrical equipment; manufacturing and sales of hand carts and animal-drawn vehicles; manufacturing and sales of material handling equipment; research and development of mechanical equipment; import and export of goods; technical services, development, consulting, exchange, transfer, and promotion; labor services (excluding labor dispatch).