Beijing HTHN technology development CO., LTD is a bearing manufacturer our factory located in Harbin Northeast province and has more than ten years experience.our company is a designated supplier of aviation and Chinese railway.we have own brand is HTHN and get ISO 9001-2008 quality certification.We are good at deep groove ball bearing tapered roller bearing thrust ball bearing angular contact thrust ball bearing.We have a perfect after-sales service, high quality, competitive price timely delivery. Up to now our customers cover the world and get praise.