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OPTECK MANUFACTURING GROUP LTD.
Labmen Instrument Limited
Canfort Laboratory and Education Supplies Co., Ltd.
Shijiazhuang Zeyuan Optics Co., Ltd.
Ningbo Hongbo Optical Instrument Co., Ltd.
Nanjing Co-Energy Optical Crystal Co., Ltd.
Yiwu Wisdom Import & Export Co., Ltd.
China Xinxing Shanghai Import & Export Corporation
GIAI PHOTONICS CO., LTD.
Shenzhen Xavier Precision Component Co., Ltd.
Shenzhen Siyuan Digital Technology Co., Ltd.
Foshan Sident Technology Limited
Wuhan Joho Technology Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
Zhangjiagang Eceng Machinery Co.,Ltd
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Shenzhen Handsome Technology Co., Ltd.