Shaanxi Tongxin Continuous Cast Tube Tech Co., Ltd. is a leading manufacturer in continuous casting iron profile and related products. With well-equipped testing facilities and strong technical background, we innovated 'Vertical upward continuous casting' in 2006, by using this technology we manufactured a new product-----Cast Iron Hollow Bar, which filled the blank market in continuous casting iron profile at home and abroad. Comparing to sand casting,centrifugal casting or horizontal continuous casting, there are many advantages of ours such as high density, zero deficiency, thin...