Dongsin EF公司成立于2009年7月25日，为造船工业，一般工业设施和工厂生产和供应高质量的金属膨胀接头，柔性软管和橡胶膨胀节。2009年11月，我们首次获得了美国杜邦公司的橡胶膨胀节正品证书。
2010年5月获得能承受振动和错位的膨胀接头技术专利，硅胶伸缩接头专利，并且开始制造防火橡胶伸缩接头。
另外，在2013年4月，我们更新了双波纹管和橡胶膨胀节的专利。
我们保证不依赖产品进口，以卓越的质量和技术为基础，提供具有竞争力的产品。
DongsinEF was established in July 25th, 2009. We produce and supply high quality METAL EXPANSION JOINT, FLEXIBLE HOSE and RUBBER EXPANSION JOINT for ship building industry, general industry facilities and plants. In November 2009, we obtained the certificate of authenticity for RUBBER EXPANSION JOINT from DUPONT in U.S.A for the first time in Korea.
In May 2010, we acquired patents on EXPANSION JOINT, SILICONE JOINT which can endure under the vibration and misarrangements, and manufacturing Fire-Resistant Rubber Expansion Joint.
Also, in April of 2013, we renewed patents on Double Bellows and Rubber Expansion Joint made with Viton.
DongsinEF guarantees that we do not rely on imported products and we supply competitive products based on Excellent quality and technology.
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