Tianjin Yuanhai Acoustic Instrument Co., Ltd., established on 2000-10-30, The business scope includes marine acoustic instruments,meter,Equipment development,Production,Sales,Maintenance and Technical Services;Production of polyurethane materials,Sales;Realtor;computer software development;Self-operated and agency goods import and export,Technology Import and Export(National law,Except where prohibited by law);Marine engineering and environmental investigation and related technical services;electronic product,Wujinjiaodian,plastic products,Chemical Products(Excluding dangerous chemicals and precursor drugs).The country has a franchise,The special provisions shall be handled according to the special provisions of the franchise.