Worm Gearboxes Factory Hangzhou Starred-River Machinery Co.,Ltd. established in 1982, is famous China Worm Gearboxes Factory and Worm Gearbox company, widely used in metallurgy, mining, machinery, energy, transportation, water conservancy, chemical industry, light industry, printing and packaging, pharmaceuticals, food, textile, construction, building materials, tobacco, logistics, and environmental protection.