No.50 Tongzhou District Popularity Ranking Beijing No.1 Laser Equipment No.2 Microscopes No.2 An Quan Guang Shan No.2 Guang Shan No.3 Measuring Systems No.3 Simulation Devices No.3 Shu Ju Cai Ji Devices No.3 Cheng Images Systems No.3 Spectrometers No.3 Jian Bo Devices No.4 LED Lighting No.4 Light Sources 高新技术企业 瞪羚企业 企业技术中心 专精特新小巨人企业 省级高新技术企业 市级高新技术企业 ISO9001认证