Well-known domestic and international sales and agency manual valve manufacturers, electric and pneumatic devices to connect the various internal thread, external thread connection, card connection, welding, flanged ball valve, globe valve, check valve, filter device, gate valve, butterfly valve, sanitary valve pipe fittings, plumbing equipment and other products. Products used in petroleum, chemical, natural gas, light, power, pharmaceutical, metallurgy, fiber, leather, textile, food, industry, construction, refrigeration, water supply piping system installation.