Tianjin Longcheng Automatic Instrument COLtd. is made up in ***** 1997, the corporation was build up by the *****, Longcheng developed into a strong enterprise. The company possesses advanced technology and equipment. Now, the production Line has already been in the majority in Chinese market and already exported all over the world. High quality service is along with you. Longcheng is your constant companion forever. Welcome to visit our web site *****