QinHuangDao City YuTian Science Technology Ltd Co., has exported products to Thailand, India, Spain, etc. We enjoy good reputation as reliable supplier from our overseas buyers. Our products hold international and national Standard Certification including ISO9001 and ISO9002 and some of our equipment have got patent. Bellow Forming machine 1.Seam welding machine 2.Hydraulic bellow forming machine 3.Mechanical bellow forming machine 4.Shear machine 5.Bellow 6.Expansion joint