Nanjing Long Survey Instrument Co., Ltd was established in 2002.we specializing in promotion and application of surveying instrument and software, distribution and whoelsale of surveying instrument and software, maintenance, inspection, technology consultation, GIS development.We offer complete surveying instrument and technology support for construction, geology, mining, surveying, ocean, agriculture and forestry, national land, power system, water conservation and education system.We winning the customers with our complete aftersale services.If you have any question about Surveying and Measurement Instrument,please feel free to contact us,We will offer you best solution A.S.A.P!