Foundry machinery manufacturing; mechanical equipment research and development; hardware product research and development; hydraulic power machinery and component manufacturing; pneumatic power machinery and component manufacturing; hydraulic power machinery and component sales; automobile parts and accessories manufacturing; hardware product manufacturing; hardware product wholesale; general parts manufacturing; valve and cock sales; packaging special equipment manufacturing; plastic manufacturing Manufacturing of products; manufacturing of fasteners; manufacturing of general equipment (excluding manufacturing of special equipment); sales of plastic products; sales of fasteners; manufacturing of architectural decoration, plumbing pipe parts and other metal products for construction; manufacturing of motorcycle spare parts; manufacturing of bearings, gears and transmission parts; manufacturing of rubber products; manufacturing of electronic components; and manufacturing of ordinary valves and cocks.