If your company in the use of measuring instrument of surveying and mapping of the seven seas questions or failure occurs, please contact Seven ocean measurement management headquarters or site maintenance, we will make notes in the shortest time or arrange maintenance, the Seven ocean measurement engineers haven't arrived before or not by the maintenance personnel, please wait patiently, do not removed. In case of staff failed to provide you satisfactory service, to play the company's complaint hotline or fax that complaints and reason, we will do our best to do better.