150 Signal trench butterfly

Hebei Yunlong Valve Co., Ltd. is located in Tianjin, south of Botou City Botou since ancient times in China enjoy a "foundry town" reputation. Founded in the early nineties, has a long history, advanced technology, improve management, production developed foundry industry, our products are developed this advantage, on the basis of accumulated years of design and manufacture of valves on the new structure New technologies, new technology and quality valve products, Our products have reasonable design, stable structure, high precision,