Taiyuan Allwin Trade Co., Ltd., export agent of Allwin group, specializing in construction and water pipelines, is located in North China. Our company has been manufacturing and distributing high-quality cast iron products for the water and wastewater industry for many years. With a good working team across North China, Allwin company . is committed to providing customers with high quality products and professional services. Our main products are manhole covers, flanged pipe fittings, ...