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OPTECK MANUFACTURING GROUP LTD.
Shanghai Lumsail Industrial Inc.
Ningbo Sunshine Import & Export Co., Ltd.
Jinan Handa Electron Technology Co., Ltd.
Ningbo Hongbo Optical Instrument Co., Ltd.
Movel Scientific Instrument Co., Ltd.
Labmen Instrument Limited
Ningbo Finer Medical Instruments Co., Limited
Zhongke-Lian Sheng (Shenzhen) Technology Co., Ltd.
Chongqing Fengdu Biotechnology Co., Ltd.
Wuhan Joho Technology Co., Ltd.
Zhengzhou Nanbei Instrument Equipment Co., Ltd.
Shijiazhuang Zeyuan Optics Co., Ltd.
Shenzhen Haiwang Sensor Co., Ltd.
Junhong Electronic & Technology Co., Ltd.
Hangzhou Gongheng Weighing Equipment Co., Ltd.
Tianjin Humanda Technology Development Co., Ltd.
Weifang Better Heavy Machinery Science and Technology Co., Ltd.
Yantai Empire Industry & Trade Co., Ltd.