Zhangjiagang Free Trade Zone Sheng Long International Trade Co., Ltd. was founded in 1999, and is a domestically leading and well-known enterprise integrating the research, development and manufacture of ceramic welding backings. Our firm has an automated tunnel kiln line of internationally advanced level as well as modern production technology and equipment. We have established a quality management & guarantee system. We are a large manufacturing base of welding backings in China. Our ...